John Cummings, an unsuccessful cosmetics salesman, has his unpaid-for car stolen by one of the hoods in the employ of Lionel Meadows, the sadistic organizer of a London car conversion racket. The car was not insured, and since the police appear indifferent to his plight, Cummings decides to find it himself -- and gets himself involved in an underworld battle.
When the detective in charge of investigating a series of bank robberies starts to get too close to the culprits, they set up a blackmail scheme to warn him off. But when the crooks begin to fall out with each other, the police learn the truth.
The mental breakdown of a guilt-ridden man provides the drama in this fascinating psychological profile starring Richard Attenborough as a scientist who can't live with himself after he accidently kills the brother of his fiancee.
