Plot: Wealthy Chicago ad executive Drew Latham has long avoided the family traditions of Christmas, but has dreaded being alone on the actual day. So when his tropical Christmas vacation with girlfriend Missy Vangilder falls through and Missy breaks up with him in the process, a self-therapy session leads Drew to decide to relive his best childhood Christmases. With his loved ones long-gone, he decides to rent a family: the Valcos, the current owners of his childhood home in suburban Chicago. Tom Valco wants nothing to do with Drew until an exorbitant amount of money is involved; they draw up a contract which expires at the end of Christmas night. What Drew doesn't (or refuses to) realize is that the Valcos are having their own problems, which his presence exacerbates. Can the Valcos endure their unexpected guest? If they can, will the money solve their problems? Meanwhile, will Drew come to realize what he wants in life and how to achieve it?
Alternative Plot: 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.