 Two henchmen assist him, along with several illegal aliens smuggled into the US by him and used to infiltrate, as employees, possible sites for him to later rob while invisible.When he successfully robs a bank vault, an investigator from the bank's insurer teams up with a woman police detective to solve the mystery of the money which to all outside appearances has just vanished.Tracking clues and interrupting other attempts by the Phantom Ruler to commit crimes, the protagonists round up enough evidence that they are not merely dealing with an ordinary crime ring.