Arthur Milton aka Der Hexer (The Magician/Ringer) must return to London after his calling card was left at the scene of a murder he did not commit.

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.

Betty is in jail after a failed raid on a jewelry store while her accomplice Bob escaped. But by chance she finds Bob's hiding place and towers with four other girls. *English title is "The Devil's Girls" not "Devil's Girls"

A wealthy businessman schemes to steal the valuable Crown Jewels from the heavily guarded Tower of London, but many tricky factors await, including a doppelgänger and a vessel escape on the Thames.