A Chicago gangster is pleasantly surprised by violent crime in London. When he discovers crooks are after a mysterious package, and murder an innocent match-seller for it, he turns detective.
Capt. Johnnie Gray is enlisted by Mr. J.G. Reeder to infiltrate a gang of forgers in Dartmoor jail on behalf of the Bank of England.
The story of a surly crew, an honest God-fearing captain, a hardboiled-but-loyal Scotch mate, a scoundrelly second-mate, and then a mutiny, the fight and the final voyage to a safe harbor. But not before the Captain has been murdered, his pretty daughter in peril, her rescue by the single passenger on board, and a member of the crew thrown overboard by another crew member.
