The residents of a New York apartment building are shocked when one of them is shot during a burgulary. They decide to hire a security expert to patrol the building, but he seem a little over-committed to his work.

An ex-con moves into an old apartment building, where he encounters a domestic problem involving a police officer, his wife, and their daughter. When he tries to intervene, however, a mysterious curse entraps him.

The story centers on a corporate climber who gets stuck working late on Christmas Eve and finds herself the target of an unhinged security guard. With no help in sight, the woman must overcome physical and psychological challenges to survive.