While Bill seeks protection against the religious compound led by Roman Grant, things heat up between the sister-wives over Margene's overtly sexual behavior. Roman "The Prophet" asks Bill's father to act as a go-between to deliver a message to his son, and the Hendricksons get together for a family dinner with Bill's business partner and his three wives. Meanwhile, Margene pressures Bill about buying her a car and Ben goes out on a date with a girl that seems too mature for him.
Nicki suspects that Bill is having an affair and is considering bringing a fourth wife to the family. Margene, feeling alone in the big house, befriends the new neighbor, Pam Martin. Bill goes after Roman and tries to expose him, but polygamy accusations also fly in the Home Plus. Meanwhile, Ben is trying to cope with his arousing sexuality and being a teenager.
The Henrickson's prepare Teenie's baptism with friction and surprises from Barb's judgmental sister. Bill decides to take preemptive action against Roman with his brother. Margene continues to butt heads with Nicki, and her misfortunes pile up. Ben wants to show his affection to Brynn but is surprised when she demands something more.
Both Bill and Barb get social recognition as Barb is selected as a finalist for a "Mother of the Year" award and Bill is asked to become a member of the Salt Lake City Leadership League. Meanwhile, the sister-wives draw up their wills, and Rhonda gets to know what life outside the compound is like for teenage girls when she hangs out with Sarah and Heather.
To Roman's surprise, Bill and Joey attend the UEB priesthood council meeting. Alby's visit to Wanda brings out her old habits, which could potentially land Bill in big trouble. Rhonda uses the acting competition as an excuse to leave the compound but she discovers that her family isn't willing to let her go. Finally, Barb attends the Mother of the Year awards ceremony but not all goes as expected.
Set 5 years prior to season one -- shows Nicki worrying about her place in the family after giving birth to son Wayne
Set 3 years prior to season one -- introduces Margene to the clan, an ex-Home Plus employee who takes a job as the family's babysitter.
Set 14 months prior to season one -- finds the three wives teaming up to try to convince Bill to move to a bigger home.
Bill wants to add a Native American businessman as a partner for his casino and sniffs for a clue of why his family has been snubbed for a big upcoming block party. Meanwhile, Barb would love to add Ana to the fold, and Adaleen has Nicki doing some spying for her. Also, Alby's secret life has gotten him in trouble.
The family dates Ana as a group. Barb awaits test results and takes steps to address Nicki's apparent infertility. With Margene by his side, Bill pursues the casino. Sarah makes plans to go to school out of state, but encounters obstacles. Don is forced into monogamy. Roman attempts to blackmail Bill into finding Rhonda. Frank introduces new wife Jodean to Lois, with explosive results.
Roman's upcoming trial creates more headaches for the Henricksons as Bill worries about Rhonda's plans to testify, the involvement of Joey's family and shocking news about Nicki's past. Meanwhile, Barb has another contentious reunion with her sister; Margene copes with a family tragedy; and Sarah changes her mind about attending her senior prom.
Sarah, Ben, Heather and Frankie attempt a risky mission to Juniper Creek to find Frankie's mother; the Henricksons adjust to cramped living conditions after a recent arrival; Bill turns to his brother-in-law for help in securing a loan; Nicki mulls going back to her job at the DA's office; Roman hints at plans for a comeback.
Nicki's homecoming, after a visit from her sister wives, isn't what she imagined; Barb endures a trying experience at her old church; Ted does an about-face on the casino project; Scott's reunion with Sarah doesn't go over well with her father or brother; Joey is upset by Bill's change of heart about Roman after the Greenes' latest move.
With the grand opening of the Blackfoot Magic Casino only days away, the Henricksons make last-minute preparations. Meanwhile, the feds probe the whereabouts of Roman Grant; Adaleen shares a shocking secret with Nicki; Margie makes an on-air slip-up; Bill and Nicki's smarmy ex, J.J. Walker, work out an arrangement allowing Cara Lynn to stay at the Henrickson's.
Ignoring pleas from Nicki to become Juniper Creek's next prophet, Bill contemplates running for the vacant Utah State Senate seat. Joey and Wanda return to Juniper Creek, but a suspicious J.J. is lurking. Sarah and Scott forgo a wedding in Bill's church in favor of a civil ceremony, shocking Barb. Margene confronts Nicki about her feelings for Ray Henry.
Bill, Nicki and Cara Lynn travel to Washington, D.C., where Bill tries to land an endorsement from Congressman Clark Paley while mending things with Nicki. Meanwhile, Margene's on-air triumph is tempered by a case of mistaken identity; Joey goes to extremes to safeguard a secret; and Barb and Sarah hit a young Native American woman with their car.
Pressed by Coburn to state his intentions, Bill gets his family to stage an elaborate rally announcing his candidacy. He isn't so lucky when an audit uncovers insurance discrepancies caused by his multiple wives. To protect his secret and save his candidacy, he ends up asking Don to take the fall, and moves up his announcement by three days.
Bill pulls out all the stops to win Paley's support for the State Senate nomination, while Nicki continues as his campaign's 'secret weapon.' Meanwhile, Margene gets the cold shoulder; Marilyn pitches to represent the casino's interests in Washington; Frank picks a bad time to drop by the casino; and Bill absorbs a last-minute sucker punch from Coburn.
Ana resurfaces with a surprise revelation. Meanwhile, Bill tries to get Tommy and Jerry to rebrand the casino; Marilyn makes yet another impressive pitch; Lois and Frank take Ben and Jodean south of the border; Nicki is infuriated by Alby; Margene worries about her booming business; and, with a flourish, Bill shows his wives the family's collective future.
With a revenge-minded Joey in tow, Bill makes an emergency trip to Mexico after Lois and Frank's latest smuggling escapade backfires. Nicki is jolted by a doctor's news, but even more flummoxed by Adaleen's shocking revelation. Margene offers up a novel remedy to keep Ana from leaving the country with her fiance, Goran. A bomb scare rocks the casino.
Sarah makes an announcement that shakes up the family; Nicki tries a new look; Margene is put on the defensive when Bill questions her real reasons for getting married. An ill-timed remark puts Barb in an unwanted spotlight; an exposed Marilyn looks to bring down Bill; Bill looks for clues about J.J. in Kansas, while Adaleen finds them closer to home.
With the election only days away, Bill puts the squeeze on Paley to protect his candidacy. But Marilyn has an ace up her sleeve that threatens to wreck Bill's chances. Meanwhile, Nicki gets news that seems too good to be true; and a late-breaking polygamist scandal forces Bill and his three wives to rethink their bold post-election plans.
The stars and creators of 'Big Love' bid a fond farewell to the acclaimed drama series as it comes to an end after five seasons.