[3] The screenplay was written by Earl Mac Rauch and Victor Miller, based on the 1977 novel of the same name by Mary Higgins Clark.

Steve Peterson's wife, Nina is murdered in front of their young daughter Julie.

Three years later, Julie and Peterson's new girlfriend Sharon Martin are kidnapped by the same killer, the psychotic Artie Taggart.

Taggart imprisons them in a bunker below Grand Central Station, throwing the police into a race against time to save the girl.

"[4] Janet Maslin of The New York Times thought the film is "a lot better" than Friday the 13th, and noted: "The story offers a few surprises, and the bowels of the railway station are scenic, in their grubby way.