After losing her virginity to Ricky Underwood at band camp, Amy Juergens discovers that she's pregnant. As Amy contends with her family life, and struggles to come to terms with her pregnancy, she seeks solace from her friends, Lauren and Madison. Meanwhile, Grace Bowman, the most popular girl at school, promises abstinence to her parents.
Ben and Amy's relationship hits a rough patch when Ben tells her that he needs some space. Amy is angry and sad at his decison and decides to give him a ring that she gets from Ashley in order to prove to him that she accepts him for who he is and loves him. Ashley and her argue and Ashley accuses her of wanting to give up the baby so that she can keep Ben. Ben has doubts about his relationship with Amy and thinks that she still has feelings for Ricky. Jack and Shawna argee to see each other. Lauren and Madison stand by Amy and Alice and Henry stand by Ben. Adrian and Grace argue over Ricky and get into a catfight, but become closer to each other as a result. Elsewhere, Grace's parents apologize to each other and Anne and George interview people who are interested in adopting Amy's baby,but George makes them leave before Anne gets a chance to talk to them because they want a closed adoption rather than an open adoption. Meanwhile, Ricky apologizes to Amy for him accidentally breaking up her and Ben. He talks to her about Ben and the baby, Amy gets upset, and Ben, Adrian, and Grace catch Ricky and Amy hugging. George's gay co-workers come by and talk to George and Anne about them wanting to adopt Amy's baby, and Amy agrees. Ricky tells Jack that he is through with both of Adrian and Grace for good and wants to be with Amy. Amy tries to pay Ben a visit but Ben's father intervenes."
Amy tells her mother that she will go to Italy with Ben, while Ashley delivers the message that Anne and David are engaged. Grace tells Tom and Adrian that George told her that he lied about the vasectomy, and the secret flies around the school, only to arrive at Amy, who asks Ashley if George told the truth. Meanwhile, when Ricky asks Leo for a raise, Leo gives Ricky the apartment above the butchershop and the raise, and David asks Anne to move into their own home.
Amy refuses to let Ben come over to say goodbye to her and John for the summer, but instead allows Ricky to take John to his new appartment. Marc Molina, the school guidance counselor, resigns at the end of the school year, while Anne starts pushing the divorce after she decides to accept David's marriage proposal. At the same time, Ashley reaches a breaking point urging George to tell Anne that the baby is his and Grace gets accepted into a medical school for the summer. Upon packing, Ben confronts Leo about Betty, but Leo reassures Ben that he trusts her. Meanwhile, Ricky is at Amy's house picking up John for the night, and Ben comes over to say goodbye to Amy. Ricky walks in on Ben and Amy kissing, but Ben gets angry and leaves.
George gives Ricky and Ben some much needed advice. Ricky and Adrienne go to couples therapy and Adrienne shares a very personal story explaining why she wants commitment so badly. Grace continues to argue with her mom over dating so soon and decides she isn't ready for a serious relationship herself. When Anne goes into labor they come to the conclusion that they won't make it to the hospital in time so George, Amy, and Ashley are forced to deliver the baby at home. Adrienne and Ricky spend the night together and Ricky finally says the words Adrienne has been waiting to hear. Meanwhile, back at the Jeurgens household George comes to a shocking discovery about the baby.
Grace's love of self-love comes out at school in the form of a campaign called "Just Say Me". Which has girls all across school abandoning sex with guys in favor of a more personal activity that has the same end result. Meanwhile, Adrian's own campaign of trying to be Amy's friend bears fruit when Amy invites her over for a visit.
Amy goes on a date with Jimmy. Meanwhile, Ashley pursuades George to vist Anne to rekindle their relationship, and Griffin sends his cousin Grant to get to know Ashley. Ben visits Grace and tells her that he wants to be friends, and as he leaves, they kiss. At the same time, Amy and Jimmy kiss. After George knocks on Anne's appartment door, Josh answers and explains Anne is with Mimsy and might come back home. While Ricky encourages Amy not to get caught up with Ben and Grace, Adrain's parents tell her they will get married, therefore causing her mom not to take the job offer in New York. Anne tells Ashely that she doesn't think it would be good for her to return home.
Amy fears that Jimmy's standoffish behavior is a result of her bad kissing, so Ricky offers to help her practice, which ends up being a bad idea. Elsewhere, Adrian's parents are planning a quiet, low-key wedding at home, and Ricky is hesitant to introduce everyone to his foster parents. A mother-daughter dance is being planned at school, but most of the students have strained relationships with their moms at the moment. Lastly, Ben must decide whether to continue pursuing Grace, and Anne suggests therapy as a final attempt for her and George to keep their family together.
George and Ruben finds out that Ricky and Amy kissed. While at the mother daughter dance, rumors fly around fast, as Anne, Ashley, Grace, Amy, and Adrian discuss each other's personal relationships with each other. Ben tells Henry and Alice that the reason why he broke up with Amy is because if he did hve sex with her, he was afraid that he would get her pregnant. He also tells Leo that he wants to get back with Amy. Meanwhile, at the mother daughter dance, rumors fly around that George and Anne will get married again. Elsewhere, Adrian asks Ben if he needs company and Ricky sends Adrian a text message saying that he loves her.
Ricky takes time to track down his biological mother and confront her about his abusive childhood. Elsewhere, George wants to modernize his look by getting a makeover. Things are still tense between Adrian and Grace, and Jack breaks up with Madison after learning something about her. Also, Amy has a meltdown after a run-in with Ben, who is still trying to decide if he really wants her back.
A messy custody battle ensues as Amy and Ricky continue to disagree over their rights as John's parents. Still angry with Ricky for breaking up with her, Adrian sides with Amy and encourages several of their friends to do the same. Elsewhere, George grows more frustrated with Anne's refusal to get re-married right away. Ben and Grace get closer, and Ashley feels ready to make some changes in her life.
Ben decides to try his hardest to keep his secret from Amy and cut himself off from Adrian, but things become complicated when his father tells Adrian's father about the pregnancy. Meanwhile, Amy is pleasantly surprised to find that her family and friends are pushing for her to attend the music program in New York. Also, George and Anne continue to argue, specifically about some of Ashley's most recent decisions.
After Amy leaves for New York, Ricky moves into her house temporarily to take care of John, which doesn't please Anne and George, since something appears to be going on between Ricky and Ashley. Elsewhere, Adrian goes to her mother for advice on what to do about her pregnancy, and her parents' differing opinions threaten to split their family apart. Ben also wrestles with the reality of the situation and vows not to let it ruin his future with Amy.
Band geeks are spreading rumors through the school that Amy is pregnant again. Ricky is especially furious with these rumors and insists they aren't true. Later, when Ricky and Ashley are alone, they kiss! Ricky backs away and hurries out of the room. Meanwhile, in New York City, Bristol Palin shows up at Amy’s dorm room and Amy finds out that all of the girls in the music program are teen mothers.
Adrian meets Ricky's mom at the clinic and admits to her that she does not want to be a teenage mother but after talking, she has a change of heart and tells Ben that she will not go through with the abortion. When Ricky gets a call from Amy, he hangs up and Ashley receives a text message from Adrian, saying that she will have the baby. Ashley, therefore, tells Anne and George, and also attempts to convince her parents to withhold the information from Amy until after Ben tells her. When Ben and Adrian visit Grace to tell her the news, Tom overhears the conversation and relays it to Jack. Ben and Jack both tell Madison about Adrian's decision, and she attempts to tell Ben to tell Amy before anyone else does.
After agonizing over the situation for far too long, Ben travels to New York so he can tell Amy about the baby before she hears it from someone else. Also, Ricky spends some time with his biological mother, who is 24 hours away from serving a jail sentence. Adrian spills the beans at school about her pregnancy in an unusual way, and Ashley thinks she might be in love with the wrong person.
Amy has not been taking anyone's phone calls for three days, and Ben is not handling it well, leading Grace to believe that she might have another chance with him. Meanwhile, George plans a romantic evening with Anne, and Ben accompanies Adrian to her first doctor's appointment. The tension continues between Ricky and Ashley, and Ricky approaches Ruben with a special request. Lastly, Amy contacts Adrian to offer her friendship and support.
Amy calls Ricky to let him know she's angry that everybody, including her parents, have forgotten her birthday. Meanwhile, Adrian has a medical scare with her pregnancy, which leads to some problems with Ben, and Grace's relationship with Grant heats up. Madison's father finds out some unsettling information about his daughter's sex life with Jack, and as Leo gets angrier with Ben, he gains some perspective on his own marriage.
Ashley tries to persuade Ricky to have sex with her and Amy takes a stance against her actions. Anne questions whether George actually wants to get married, contrary to his original claims, and suggests that they finally spit up without hurting their children. Elsewhere, Adrian believes that Ricky is just using Amy for sex and Grace wonders if Adrian is considering marriage. Meanwhile, Amy goes out with Ricky; and Grace and Grant prepare for camp.
No one is happy about Amy's plans to move in with Ricky -- including Ricky. Leo encourages Ricky to think about college, and Anne accuses Amy of rushing things with Ricky as a way of competing with Ben and Adrian. Madison is uneasy with Jack's decision not to have sex with her, and Grace asks her mother for a sleepover with Grant.
Adrian and Ben prepare for the imminent arrival of their daughter. When Adrian experiences discomfort, the couple - believing she is about to go into labor - are instructed by their doctor to leave for the hospital. Ben and Adrian agree not to call anyone until they know more, but as word spreads she is in the hospital, family and friends gather there to share the joyous occasion. But the couple learn some devastating news that will change their lives forever and will need those closest to them for support.
Adrian is in a deep depression, refusing to leave the house, while Ben struggles to keep it all together after losing their baby. Ben has returned to school, but is devastated and angry about the situation. Ben asks Amy to visit Adrian at home to help her through this difficult time. Meanwhile, Amy feels a little guilty for being so happy in her own life – she’s in love with Ricky and their relationship seems to be growing stronger by the day. Ricky insists they shouldn’t feel guilty and invites Amy and John to move in with him.
It's time for senior prom!! Amy is mad that Ricky doesn't want to go so she pressures him into taking her to prom. Adrian and Ben go together, and Amy finds out Adrian is trying to get pregnant. Later, after the dance Adrian tries to seduce Ben into sleeping with her so she can be prego and keep him in the marriage.
Amy is increasingly short with everyone in her life, including Ricky, leaving him wondering what is going on with her, but he is not prepared when she reveals that she might be pregnant again. Ben, determined to get permission from Dylan's parents to see her, makes another attempt to win them over, but it doesn't turn out quite like he hoped when he ends up sharing too much information about his family. Grace is unsure how to react to her mother's shocking news about the secret her father kept from everyone and turns to Jack for support. And, Anne's evening with Nora raises questions for George.
Ricky and Amy decide to run off together to escape all the drama at home with Anne's recent announcement that she's gay and Ashley's return home. But, will they decide to say 'I Do'? Meanwhile, Ben struggles with the knowledge that he may have contributed to burning down Dylan's school. And, now that Adrian is done with summer school and graduated, she's looking forward to college and Grace makes some difficult decisions about her relationships.
t's Christmas Eve and Ricky and Amy are celebrating their first holiday together as a family. Ricky talks about an old tradition he had as a kid of sneaking into a toy shop with his fellow foster care friends every Christmas Eve. Ricky, Amy & John decide to continue the tradition and sneak their way into Hedy's and are amazed by the holiday fun inside. Ethan, dressed as Santa to surprise John, brings a very pregnant Kathy with him to join in on the fun. Meanwhile, Grace stays by Jack's side at the hospital hoping for a miracle while he's still in a coma since the beating. But, everyone is in for a holiday surprise when Kathy suddenly goes into labor.
Ben is in a euphoric mood, while driving Ethan to the airport he has an epiphany that Amy may not have been his first love. Omar leaves his student teaching job and proposes to Adrian. Ethan pleads with Kathy's parents to let her return home with him. Ricky confides in Dr. Fields about Amy's lack of enthusiasm towards their marriage - and Amy confides in Dr. Fields that she has other hopes and dreams. Meanwhile, Jack is restless with his injuries and enlists Grace's help. And, George meets with David to discuss Robie's paternity.
Amy and Ricky's relationship grows increasingly strained when Amy decides she wants to tour a college in New York. Leo questions Ricky about his friendship with Clementine. Jack goes to extreme lengths to protect himself with potentially devastating consequences. Adrian is not happy when Omar goes on a business trip without her, especially when she learns that Amy is on the same flight. George's need to distance himself from Anne leads him down a new career path. Meanwhile, Cierra offers to tutor Ethan in math but his pride keeps him from accepting her help.
George and Reverend Stone insist that Jack see a therapist, but it's Adrian's advice that ultimately persuades him to go. Ricky feels Amy's absence as he juggles taking care of John with his work and school responsibilities. Cathy is stunned when she learns that her ex-boyfriend wants to see their baby. Amy realizes that she doesn't want to lose Ricky. Meanwhile, Leo secures an important business account.
Ethan is convinced no adult actually uses algebra, but a chance meeting with Danica McKellar helps him look at math in a different light. Amy's frantic search for her missing wedding bands leads her to Ben, who advises her to break-up with Ricky before it's too late. George and Kathleen's romantic dinner is interrupted by an uninvited guest. Meanwhile, Mrs. Stone confronts Grace about her relationship with Jack.
Amy and Ricky announce they will get married the day after Amy graduates from high school, but everyone is skeptical that the wedding will actually happen. Grace and Jack announce their engagement, but it's soon clear that Grace is having second thoughts about her decision. George and Kathleen are distracted from their secret plans when their mothers arrive for unexpected visits, but they eventually include their families in a special surprise. Meanwhile, Ethan is jealous when Kathy agrees to help Brian prepare for the spelling bee.
Amy, Adrian and Grace struggle to reconcile their pending marriages with their individual dreams. Anne begins to feel like an outsider in her own family but soon finds an unexpected ally in Kathleen. Kathy and Ethan get into a fight after Ethan questions the status of their relationship. Leo worries about Ben's obsession with Amy. Meanwhile, Chloe reconnects with someone from her past.
Adrian is devastated by Omar's decision and takes her pain out on Ricky and Jack. Ben refuses to give up on his dream of reuniting with Amy and makes a shocking confession to Alice. Ethan and Margaret have an honest conversation about his relationship with Kathy. Meanwhile, Clementine returns to town and pays Ricky a visit.
Ricky suspects that Amy is hiding something and confronts her about their future. Everyone gives Ethan some much-needed advice about his love life. Amy is furious when she learns the lengths Ben will go to in order to win her back. Jack's commitment to Grace is tested, and Henry makes an important decision about his future. Meanwhile, Chloe finally puts her past demons to rest.
High school graduation is finally here, prompting everyone to reminisce about how much their lives have changed over the past few years. Amy's relationships with Ricky and Ben weigh heavily on her mind, while Grace contemplates Jack's place in her life. Meanwhile, Adrian is ecstatic when an unexpected visitor knocks on her door.