On a scientific expedition to Africa, Dr. Janos Rukh discovers a meteorite containing an unknown element a thousand times more powerful than radium. After becoming contaminated, Rukh kills everyone he touches. His friend Dr. Benet develops an antidote, but its effects are short-lived. As paranoia sets in, the doctor goes insane as he is increasingly unable to control the urge to kill. © 1936 Universal Studios. All Rights Reserved.