A couple of master thieves find themselves trapped within a house they intended to rob, only to discover they've inadvertently wandered into the lair of a deranged serial killer.

Della Myers is an overwhelmed upper-middle-class housewife who lives in a large house in the suburbs with her twin children and her abusive husband, Kenneth. Kenneth lets Della know that he thinks she gives all her attention to the twins and neglects her house and her appearance. Late on Christmas Eve, Della drives to the local mall to buy gift-wrap. While searching for a parking space in the jam-packed lot, Della notices an old car taking up two spaces. Frustrated and annoyed, she decides to leave a paper message on the windshield of the old car, writing, "Hey, 'Jack'. How selfish can you be?" After the mall closes, Della's car is held by the driver of the old car and she is threatened by four punks -- Chuckie, Huey, Vingh, and Tomás. When the security guard of the mall attempts to protect Della, he is shot and killed by Chuckie. Della tries to escape from the criminals in her truck...