Rarely do magicians reveal their professional secrets.
While desperately searching for their father, Frank and Joe find themselves wo.
Hardy is playing a joke on them.
When their detective father fails to reappear, his sons are convinced that something sinister is afoot, despite Hexton\'s insistence that Mr.
Hardy to be the subject.
Consequently Frank and Joe Hardy are amazed when a well-known magician, the Incredible Hexton, offers to reveal the Secret of his ``Vanishing Man Act`` and invited Mr.
Rarely do magicians reveal their professional secrets