Riuscirà il nostro eroe a ritrovare il più grande diamante del mondo?

Jimmy Logan, a detective, tries to retrieve a diamond from the British crown stolen by the traitorous chief of the English Secret Service. After carrying out dangerous investigations at Montecarlo, Beirut and Hamburg, he discovers that the headquarters of the thieves is located in a mental hospital and sets about infiltrating their ranks.

Island of Lost Girls

Female American tourists are being kidnapped by a crime ring headed by a beautiful Asian woman. They're drugged and then sent to an island where they are kept as sex slaves to be used by wealthy tourists. Two agents are dispatched to rescue the women and put an end to this operation.