A former policeman falsely jailed for the murder of his wife's lover lands a job as a nightwatchman at a college on release, and sets out to track down a killer stalking the campus. Mystery thriller, with Burt Lancaster, Susan Clark and Cameron Mitchell.

An ex-convict, and ex-cop, finds himself in the midst of drama as a murder, of a female student, is commited at the university where he works as a night watchman. He is reluctantly drawn into the criminal investigation and eventually becomes a suspect in the case. Will he be able to find the real murderer and clear his own name, or not?