The day Johnny Gray is released from Dartmoor he learns that Marney Kane, the girl he loves, just has married. Johnny's disappointment turns quickly into horror when he realises that the bridegroom is not whom he claims to be. Marney has unknowingly married the son of her father's worst enemy. Johnny becomes entangled in a fiendish plan and he has to risk his life to save Marney.

Richard Horatio Edgar Wallace (1875-1932) was one of the world's most famous crime writers. He wrote more than 120 mystery novels, including "The Four Just Men", "The Fellowship of the Frog" and "The Squeaker".