While plans are in full swing for the Keaton's 20th anniversary party, Steven and Elyse are fighting and it looks like they may not make it that far. Elyse wants to have a big party to celebrate the Keaton's 20th anniversary and Steven reluctantly agrees. Steven's enthusiasm for the affair diminishes even further as Elyse's guest list expands and the domestic problems begin to stack up, the happy couple are at each other's throats... until the kids decide they'd better do something if they want their parents to stay together.