A man is accused of a series of murders that were actually committed by a crazed killer called "The Tiger." He must prove his innocence and catch the murderer.

The film begins in a BBC studio with the 100th edition of "In Town Tonight". Flotsam and Jetsom open with a "topical number". Then there is an interview with a distinguished actor, which dissolves into a performance of one of his famous melodramas about a wicked moneylender etc.

An evil prison administrator cruelly abuses the inmates at his prison, until one day the tables are turned.