In the series opener, Susan and Bruce Miller move into an upscale Chicago suburb, where they are introduced to the concept of an open marriage by their sexy new neighbors, who invite them to a swinger party at their house.
Bruce celebrates a great day on the trading-room floor by attending a party at the Playboy Club; Tom gets a promotion to fly the new route to Tokyo, but Trina worries about what it will do to their relationship; Janet entertains her new neighbors and realizes how important her friendship with Susan is; Samantha runs away from home and tries to live out on her own in the woods; Laurie attends a play with Logan, but she's embarrassed by his behavior.
Susan tries to mend her friendship with Janet by asking her to help plan a housewarming party, but Trina intrudes with a bloated guest list and an unconventional idea involving fondue dipping; Laurie spends the evening in a closed library with her teacher helping him sort through books, but she has more on her mind; Rick and B.J. get caught selling a stolen Playboy magazine and are grounded.
Susan and Bruce invite the Deckers to join them for a weekend getaway at their two-bedroom cabin when the Thompsons back out of the trip. Later, things really get cozy when Roger and Janet change their minds and decide to drive up to the cabin. Meanwhile, Laurie invites Doug over to her parentless house for dinner, and B.J., Samantha and Rick break into the Deckers' house to go for a swim.
Against Bruce's wishes, Susan attends a fund-raiser at the Decker's house to benefit "Deep Throat" actor Harry Reems, who is in legal trouble due to his appearance in the controversial movie, and she talks Janet into going with her.
Tom gets jealous when Trina meets up with her high-school sweetheart; Susan attends a ladies' luncheon to help promote Bruce's career, but it's Janet who makes the biggest impression at the gathering; Roger is fired from his job; Laurie and Doug get physical in their relationship now that he is no longer her teacher.
Tom throws a pool party on a blisteringly hot day, but Trina is steamed about his recent affair. Things get more heated when Susan arrives with Roger, who is seeking advice from her upon losing his job. At the office, Bruce gets intimate with a coworker, Melinda.
Trina hosts a "Puzzlerama" party where mismatched couples attempt to discover game clues based on dark secrets in the neighborhood.
Laurie and Doug interrupt her parents' "after party" with Brad and Sylvia.
Bruce and Susan plan a trip to the cabin to spend time with each other and their kids, but Laurie has her own plans to meet Doug; Janet and Roger visit a therapist.
Tom and Trina teach the Millers how to line dance; Janet takes a job with a local newspaper.
Roger and Susan plan a surprise party for Janet, but the celebration includes some additional surprises that are more shocking than festive. Anthony: Rylan Williams. Michelle: Latarsha Rose. Matt: Matt Barr. Sherry: Colleen Foy. Sullivan: John Posey. Lisa: Caitlin Custer.
The first season ends with Trina and Tom hosting a clambake and key party to celebrate the end of summer.