Tony Wallis

A young policeman and a small-time crook are both involved with the same girl.

Five people visit a fairground sideshow run by the sinister Dr. Diabolo. Having shown them a handful of haunted-house-style attractions, he promises them a genuinely scary experience if they will pay extra.

Jonas Wilde, a British secret agent licensed to kill, wants to resign from his murderous work, but his superiors pressure him into taking on a new assignment-the assassination of a defecting Soviet scientist. In the course of the dangerous mission, he discovers a mole has infiltrated British intelligence.