A ship sends out a frantic SOS after an explosion onboard. Someone is sabotaging Navy ships, and Lamonte Cranston decides it’s time for the Shadow to come to the aid of his country. What criminal mastermind will he be up against?
The gang of saboteurs force one of the sailors to cooperate. Shadow has to spring into action if he hopes to prevent another sabotage. Can the sailor who has been forced to sabotage be rescued from a criminal fate? The Shadow shares some secrets on how he can appear to be invisible.
At the hands of the saboteurs, the Shadow faces being defeated, and blown to bits.