Jack McKay decides to throw a party at the Bel Age hotel to celebrate his release from prison. Dylan invites both Brenda and Kelly who eventually chooses Kelly over Brenda. Mel and Jackie's marriage crumbles, leaving David afraid that he'll no longer have access to his baby sister. Meanwhile, Brandon's interest in gambling takes a dangerous turn when he loses $500. Dylan and Kelly incur Brenda's rage when they tell her about their summer fling and she cuts them both out of her life.