A small-time smuggler finds himself in over his head in this crime thriller directed by Basil Dearden. Cocky merchant seaman Dan MacDonald makes ends meet by dabbling in a spot of petty smuggling in post-war London. But his life quickly changes when he's framed by a gang of jewel thieves after a robbery in the city. Now, with his best mate Johnny in the dock for murder, Dan must put his life on the line to prove his friend's innocence.