Sherlock Holmes and Dr. Watson embark on a search for Cleopatra's ancient necklace, which has been stolen.
Dr. Mabuse has been locked away for years in an insane asylum. Suddenly crimes start occurring and no one knows the culprit. A detective goes to visit the Doctor to find some sort of clues to the robberies.
A scientist experimenting with suspended animation decides to use himself as a test subject. Before he is frozen, his wife is killed, and he is suspected of her murder. a murder suspect.
