Canadian horror directed by Bob Clark in which a group of sorority sisters find themselves having to stay in their sorority house over the Christmas break. They begin to receive eerie phone calls from a man they call 'The Moaner', and when Barb (Margot Kidder) invites other girls to listen in on one of the calls, she aggravates him and he threatens to kill them all before suddenly hanging up the phone. What they don't realise however, is that the creepy caller is closer than they think...