To the dismay of the Keaton children and their equally conservative grandparents, Steven and Elyse take time out Thanksgiving Day to attend an anti-nuke rally-and end up spending the holiday in jail.

Elyse is chocked by her soon-to-be-divorced mother's quick and free-spirited plunge into the singles world, and sparks fly between the two women when Elyse can't help but interfere.