The Long Memory

John Mills stars as Davidson, an embittered convict who has been released from prison after serving a sentence for a murder he did not commit. Ill at ease in the company of others, he takes refuge on a barge, which is constantly under surveillance by police. He determines to ruin his enemies one-by-one and tracks them down only to find himself drawn into a new crime, which will bring him face to face with the true murderer.