The sudden death of the Tin Man during a community performance of The Wizard of Oz throws the normally sleepy town of Rome, Wisconsin, into chaos and throws Sheriff Jimmy Brock right into the middle of a difficult murder investigation. Meanwhile, when the favourite singing group of Brock's teenage daughter Kimberly arrive in town, they prove not to be what either she or Deputy Kenny had anticipated.
The townspeople of Rome are plagued by a mysterious "serial bather" who sneaks into their homes while they are out and takes a bath. The pressure is on for the Sheriff's department to apprehend the disturbed felon as suspicion falls on Frank the Potato Man, a homeless man who lives in the woods outside of town. Meanwhile, a farmer claims a neighbor's still intoxicates his cows.
It's Halloween and Jimmy decides to reopen the ten year old suicide case of Rosemary Bauer when Karina Shaw, her former maid who hasn't spoken since the death, suddenly utters the word "murder". On the strength of this new piece of evidence, the case is reopened and elderly Rome resident Howard Buss confesses to killing Rosemary, bringing proof of his guilt to the authorities. Meanwhile, holiday tricks get out of hand.
Jimmy considered it before but now Jill decides she will run for mayor after Bill Pugen ignores women's rights once too often. At a police speed checkpoint, Max and Kenny stop a man with false papers and Kenny, recognising him as former Middle-Weight Champion of the world Jeff Freed, wants to waive the charges against him. He then arranges a match between himself and Freed, with half of the proceeds going to the boxer and the other half going to a local charity.
A group of heavily armed Chippewa Indians declares war on Rome and takes over the courthouse, as a dispute over enlarging the golf course gets violent. Ginny accuses Jill of discrimination when she agrees to give an abnormally young boy a controversial growth treatment. Matthew stands up for Zach against the school bully.
A jury must decide if it's murder or a mistake after Leonard Taylor, a man with a brain disease that distorts vision, shoots and kills his own brother Brian, when the sibling enters his home in the middle of the night. As Jill and Jimmy clash over his motives, Ginny is romanced by Dr Vernon Leaky, a specialist on the brain condition who arrives in Rome for the trial. Meanwhile, Max is horrified to discover that Kenny and Mayor Rachel have been having an affair.
A tornado threatens Rome and Zach is so worried for Kimberly's safety that he sets out on his bike to warn her. Kenny's hooker is arrested in a sting operation organised by Max, who ends up commiting a felony by covering for him. Wambaugh's wife leaves him after he embarrasses her at their anniversary party.
Rome is in a flutter when Mayor Bey announces that the Pope himself is coming to visit the town. It's a day of celebration as His Holiness arrives, but the walk down main street ends in chaos when someone in the crowd opens fire, killing a man. The resulting investigation reveals the death was suicide, according to the dead man's gay lover... until the Pope announces he saw the whole thing and that it was, in fact, murder. The court case that follows threatens to end Judge Bone and Wambaugh's tempestuous friendship for good.
In the middle of a major snow storm, Judge Bone has a heart attack while, snowed-in at the police station, Mayor Bey goes into labor with only Jimmy to deliver her baby. Meanwhile, it's bonding time with lots of alcohol for Jill, Kimberly and Lydia, as Max is reunited with an old adversary - the one and only Barney Bratwurst.
After being struck by a falling power line in a fluke accident, Carter meets his long dead Grandpa Bob while clinically dead for about 3 minutes. This causes him to question his relationship both with God, and his girlfriend Sue. Judge Bone meets up with an old flame from over 50 years ago, both of them now widowed, and a little flames are rekindled. Zack gets a crush on a beautiful young Asian gal that is in their home for a week for some kind of musical competition; she is a cello prodigy. However, she has eyes for Zack's older brother, Matthew, and Zack catches them kissing after dark, and is heartbroken.
With Mayor Bey off on maternity leave, Acting Mayor Max stirs up trouble in Rome with her sweeping changes and orders. Shock jock Chuck Dante makes the situation worse by homing in on her actions on his radio show. And though the situation doesn't seem that serious at first, it becomes that way when Max is gunned down.
It's the christening of Mayor Bey's baby, Michael, but the Rome residents are flabbergasted when Laurie announces that she had the baby for her brother Jerry and his lover Gordy, who plan to raise the baby in the town. The Beys' estranged mother Christine, who turned her back on her children because she was deaf and he was gay, turns up and announces she is taking them all to court to get custody of her grandson. Tension brews in Rome as the people take sides on the issue and a campaign begins to have Laurie removed as Mayor, resulting in Jerry and Gordy being attacked at the supermarket by a vicious homophobic gang. Despite attempts by the prosecution to discredit the men and prove their lifestyle is unsuitable to raise a child in, Judge Bone ultimately rules in their favour and allows them to keep baby Michael, saying he doesn't feel they pose a threat to the boy. The court case over, Mrs Bey leaves Rome again under a cloud, and Laurie is emotional as she leaves the baby in the care
Carter inadvertantly proposes to Sue after she gets her wires crossed. Nevertheless, he's a man of his word and they announce their engagement to the people of Rome. Their sudden decision to wed prompts Kenny and Max to do the same, although they later begin to experience cold feet. Digging in her friend Selma's backyard, Myriam Wambaugh discovers human remains and Selma goes on trial for murder. Persuaded to defend her by his ex-wife, Wambaugh manages to get her off and passion erupts again for Doug and Myriam, who decide to get re-married in a triple ceremony with Carter & Sue and Kenny & Max. Meanwhile, the Brocks' marriage is in serious trouble, with Jill feeling they've come to the end of the line. She moves in with Joey to do some thinking and Jimmy is left to do the same. At the wedding, the three happy couples tie the knot and the wedding fever gets to Jimmy and Jill, who make up and get back together. As the cast gather for a group photo in their wedding finery, we wave a sad
The coach of the kids' basketball team collapses at a game and the parents group appoints Jill as interim coach. At first she is determined to play fair and give all the boys a chance, but under pressure from more gung-ho adults, she becomes as obsessed as the rest of them. Fed up with all this, Zach and the other boys on the team take out a court injunction against them. Meanwhile, Matthew becomes hooked on gambling and gets himself into serious trouble.