 A remake of the 1974 horror movie Black Christmas. The movie tells the story about Billy, a young boy who was abused by his mother as a child. While his mother was cheating on Billy s father, she eventually killed his father and kept Billy in the attic - for good, while she was with her lover and starting a "new" family. As Billy s mother fell pregnant with a daughter and treated her with love, which Billy had never experienced with his mother, Billy came out of the attic after years and brutally murdered his mother and her lover. Cut to present day, a group of eight sorority sisters consisting of Kelli (Katie Cassidy), Dana (Lacey Chabert), Lauren (Crystal Lowe), Megan (Jessica Harmon), Claire (Leela Savasta), Heather (Mary Elizabeth Winstead), Megan (Jessica Harmon) and Melissa (Michelle Trachtenberg) and their house mother (Andrea Martin),who now live in Billy s childhood home, find themselves being harassed by threatening and intimidating mystery phone-calls during Christmas Break and as one of the girls goes missing, the girls begin being murdered one by one by no other than Billy...