A mysterious criminal known only as 'The Shadow' is blackmailing the wealthiest citizens of London. Scotland Yard is on the case, but anyone who discovers clues to the Shadow's true identity is murdered. Chief Inspector Fleming believes that the killer isone of the guests at his sprawling mansion. But with his boarders including a former safecracker and a mystery novelist in search of his next bestseller, uncovering the Shadow's secret may not be as easy as he thinks.
