Cal Calhoun, when he was a police detective, arrested a man for murder. Six hours before the man is to be executed, Calhoun is convinced the man is innocent. Calhoun makes progress and is on the verge of cracking the case when he realizes he's also the victim of deceit. The clock is ticking and Calhoun may lose his own life before he can save the prisoner's life.—Bill Koenig