Shrek (character) (Mike Myers) is quietly living in the swamp with his family when the Christmas season arrives. Under Donkey (Shrek) (Eddie Murphy)'s urging, Shrek reluctantly promises Princess Fiona (Cameron Diaz) a special Christmas surprise. Shrek goes to the local bookstore in Far, Far Away to try to find a present for Fiona, but since he does not know what Christmas is all about, the shopkeeper (Marissa Jaret Winokur) gives Shrek a copy of ''Christmas For Dummies'', a step by step guide to celebrating the holiday. Shrek proceeds to follow the book's advice by decorating the house and getting a tree so he can spend a quiet Christmas Eve with his family, but Donkey brings the entire "family" to the swamp, ruining shrek's plans.