It's graduation day at Huntington Hills High, and you know what that means - time to party. And not just any party, either. This one will be a night to remember, as the nerds become studs, the jocks are humiliated, and freshman crushes blossom into grown-up romance.

A man claiming to be Carol Brady's long-lost first husband, Roy Martin, shows up at the suburban Brady residence one evening. An impostor, the man is actually determined to steal the Bradys' familiar horse statue, a $20-million ancient Asian artifact.

A wealthy executive, Drew Latham (Ben Affleck) has no close relationships and becomes nostalgic for his childhood home as Christmas approaches. When he visits the house and finds another family living there, he offers the residents, Tom Valco (James Gandolfini) and his wife, Christine (Catherine O'Hara), a large sum of money to pretend they are his parents. Soon Drew tests the couple's patience, and, when their daughter, Alicia (Christina Applegate), arrives, things get increasingly tense.