A new teacher and her physician husband find themselves under siege on Halloween night by homicidal, mask wearing twins. Ambiance is the key to Coyne's screenplay. The story is fairly straightforward, however, as the violence ramps up and the victims are chalked off one at a time, the malevolence of the twins, and their apparent lack of motive becomes palpable. Andrew Ceperley's brooding score is essential, with its oppressive notes coming from the Carpenter playbook. Brea Grant stars as an L.A. native who accepts a job teaching at the twins’ school. Her banter with Graham Skipper (who plays her husband) is surprisingly snappy, with the two leads playing off one another with a naturalness that endears them to the viewer.