Frank and Joe Hardy suspect that their best friend Chet Morton is the victim of a summer school swindle and offer to help get his money back. While probing a ba

Frank and Joe are called upon to find a wealthy industrialist’s son who has mysteriously disappeared. The only clue in the case leads the two young detectives

Frank and Joe race against time to retrieve a scientist’s top-secret invention before thieves get their hands on it. But the young detectives soon discover th