Attending a birthday celebration for two young girls, Bea Abbot tries not to let superstition get the better of her when she realizes that there are thirteen people at dinner. What she doesn't anticipate is that the evening will end in sudden, violent death. Chaos descends when a fire breaks out. While two members of the host family are rushed to the hospital, Bea and a fellow guest search for the birthday girls in a house which has been plunged into darkness. And then the drama really begins.