It’s Christmas at a college somewhere in North America, and the girls of a campus sorority house are welcoming the season with boys and libations. For Clare, Jess, Phyl, Barb and their house mother, Mrs. Mac, it’s an especially sweet time, as the house welcomes kids from the neighborhood for a party and the spirit of giving is in the air. But soon, giving turns to screaming as one of them finds herself confronted by a mysterious stranger who has seemingly entered the house via an upstairs window.  Soon, the case of one missing girl draws in the residents of the house, the local police, and the town, and an oddly hard-to-locate killer initiates a game of hide-and-seek, sororicide, and some truly awful telephone etiquette.