Billy ignores Alison's wishes and tags along when she heads to Wisconsin for her father's fiftieth birthday party. He is furious when Alison refuses to share the news of their engagement. When Alison's ex-boyfriend Adam serenades her during the party, Billy announces the engagement. Adam warns Billy that the Parker family is ""weird."" Alison is haunted by nightmares after returning to L.A. Jane and Sydney's grandmother dies. Jane learns that she is to inherit $100,000, and decides to start her own design firm. Her plans are complicated when Syd and Michael seek a cut of the money because it is willed to ""Dr. and Mrs. Michael Mancini."" Michael confronts Matt about his confession to Jane, and they duke it out. Jo's potential romance with a model is quashed when he learns about her pregnancy.

Jo is certain that Amanda will not gracefully bow out of her relationship with Jake. Hillary refuses to believe that Chas tried to seduce Amanda. Chas files a $10 million sexual harassment suit against Amanda, and the agency does not support her. She turns to Jake for consolation. Sydney is assaulted by three hookers when she invades their turf. Kimberly comforts her and pays her rent. She convinces Syd to participate in her plot to kill Michael, and they plan the crime over ice cream. Michael stands in the way of Jane's plans to expand her business. Billy's college friend Rob comes to town to serve as his best man, and gets along well with Matt. Billy is stunned to see them kissing in the courtyard.

Jake sleeps with Amanda. Jo catches him coming out of her apartment half-dressed. Jake insists that he doesn't want to reunite with Amanda, but Jo breaks up with him. Amanda tries to make nice with Alison in the hopes of convincing her to not to testify on Chas's behalf. Kimberly drugs Michael, and she and Syd leave him in his car with the engine running. However, Jane revives him when she and client Chris Marchette come over to discuss a business deal. Before the wedding, Michael refuses to sign off on Jane's business proposal, so she threatens to kill him. Kimberly steals Jane's car keys. As Alison is about to walk down the aisle, her father's words of reassurance trigger a repressed memory. She realizes that her father molested her during her childhood. He threatens to kill her if she tells anyone. Alison fails to emerge for the ceremony, and Jane and Billy discover that she has fled through the window. She seeks refuge at her sister Meredith's San Francisco home, unaware that her f

Michael survives the hit-and-run, but suffers from amnesia. Jane is released when she offers evidence that incriminates Sydney. Kimberly promises to serve as Syd's alibi, then refuses to cover for her and plants a blonde wig at her apartment. Sydney is arrested. Billy deduces from Mrs. Parker's strange comments that Mr. Parker molested his daughters, and goes to San Francisco in search of Alison. Mr. Parker comes inside the house and threatens Alison, but Meredith holds him at gunpoint. He escapes when Billy bursts through the door. Billy becomes angry when Alison agrees with Amanda's advice and decides to prosecute her father instead of going to Las Vegas to elope. Jake breaks up with Amanda and decides to spend time on his boat. He takes in a beautiful woman named Brittany, who had jumped overboard following an argument with her abusive husband.

Kimberly brings Michael home from the hospital. Sydney convinces Matt to visit her in prison, and tells him that Kimberly is setting her up. Sydney's father flies in from Chicago, but enrages his daughter by suggesting she seek a plea bargain. Matt becomes suspicious of Kimberly when he realizes that she is shielding Michael from the truth about their history. Sydney's outburst convinces Mr. Andrews that she is crazy, and he and Jane have her committed to a mental hospital. Alison and Meredith fly to Wisconsin and attempt to file charges against their father, but Meredith bails out when she realizes that the town respects Mr. Parker too much to give their story credence. Alison confronts her father in front of all the prominent townspeople at a barbecue, and pushes him into admitting his guilt. Billy is fired when Nancy learns that he helped D&D get the inside track on the Escapade account, but lands a job writing ad copy for D&D. Jake sleeps with Brittany, unaware that Palmer Woodward