 Megalomaniac and would-be world dominator Roxor has kidnaped Robert Regent, along with his death ray invention, in hopes of using it to degenerate humanity into mindless brutes, leaving himself as Earth s supreme intelligence. Faced with revealing the machine s secrets or allowing his family to die a horrible death at the hands of Roxor, Regent s only hope lies with the intervention of his brother-in-law, the be-turbaned yogi and magician Chandu, who has the power to make men see what is not there  even unto a gathering of twelve times twelve .