The sister of a famous, but as yet uncaught, criminal named "The Hexer" is murdered. Inspector Higgins of Scotland Yard believes that "The Hexer" will surface to take his revenge on his sister's killers, and plans to set a trap to finally capture him. However, soon bodies start piling up, and it looks as if "The Hexer" may get away yet again.
Mobsters conspire to loot another criminal's treasure secured in an enormous booby-trapped vault.
Mike Hilton served eight years in prison for being innocent. When he is released from prison early, he wants revenge on the men who were responsible. But the ex-commissioner in charge at the time, Jack Bellamy, has given in to drunkenness. And Mike's lawyer Cunningham continues to make crooked deals. He holds the key to solving the case. When Bellamy picks himself up again, he and Hilton are able to bring Cunningham and the gangster Whity to justice.
