Paul and Jamie Buchman are newlywed adjusting to life together in Manhattan. When only after 5 months of marriage Jamie complains that their sexual life is not like it used to be, Paul decides to come earlier from his job so they could spend a nice evening alone. But, their scheduled evening goes awry as each assumes the other had cancelled their dinner plans with friends.

To Paul, a couch by any other name is not a couch, especially if it is a divan, a settee, or worse, a love seat. Jamie is determined that their first major purchase to be jointly made and when dragged to the department store, Paul manages to hyperventilate. When they hang out together in the store, Mark discovers to Paul some informations that he probably shouldn't ever find about.

Paul and Jamie enjoy a quiet Sunday with nothing to do except decide what to do. However, they have to decide whether to see a movie, take in a parade or get to the museum before their friends' Sundays' intrude.

News of his ex-girlfriend visiting New York first fills Paul with excitement, followed by guilt, culminating in blithering idiocy after he invites Jamie to Riff's to meet her and Jamie accepts.

Paul's film about Yankee Stadium is rejected by PBS the same day Jamie snags a major advertising account, turning her celebratory bash into a defeat party.

Planning their last will and testament together brings up the subject of Paul's old bachelor pad, which he now sublets to Cosmo Kramer (guest star Michael Richards). Jamie wants Paul to get ridden of his apartment, but Paul is against that. They get into a fight, which results by Paul deciding about the future of his apartment and Jamie getting ridden of her t-shirt from her past (which she later wants back).

On a trip to Connecticut to spend Thanksgiving with Jamie's parents, Paul and Jamie are doing fine, Mark and Fran begin to fight, while Selby and Lisa are just friends. However, on the return journey, everything is different.

The story of how Paul and Jamie met is told, beginning with a chance encounter on a Sunday evening by the newstand, followed by Paul's hard work to locate Jamie. Jamie breaks up with her boyfriend and is feeling strange. Paul appears in her office bringing her clothes and as time passes, they go on a dinner date...

The Buchmans find their new once-a-week maid, Masha (guest star Beata Pozniak) a big help, but she is heartbroken that her affection for ""Mr. Paul"" isn't being reciprocated.

Producer Jamie gets to hire the director for a new spot for the New York City tourism campaign and picks Paul so they can work together. However, they soon find out how much togetherness is too much.

Jamie's new client is a former TV star, Diane Caldwell (guest star Barbara Feldon) idolized by Paul and Ira in their childhood. They quickly revert back to their old ways and compete for star attention. But, Ira charmes Diane before Paul and gets to spend a night with Diane. But, next day, everything is about to change when Ira finds out the truth...

Jamie hires an ex-boyfriend, Sherman (guest star: Rick Rossovich), to paint the apartment and is a bit annoyed when Paul is not concerned by the prospect of her old flame being alone with her. When Paul comes home from his job, he finds Sherman and Fran together in their bed having sex, because Fran is stressed over her move-out from Mark's apartment. So, Paul talks to Mark about their marriage. Jamie and Paul try to get them together back, but they decide to get split.

At the Buchmans' first anniversary party, love blossoms between Warren and Connie, while Paul tries to turn back the clock. However, there is no love between the now separated Fran and Mark.