Dr. Janos Rukh discovers a certain type of radium that has almost magical healing properties. But the element has a dangerous side, too, and it has already started affecting Rukh. Consumed by paranoia, he begins to suspect that his wife is having an affair. Wild for revenge, Rukh hatches a deadly plot...using his own poisoned body as a weapon to kill.

"Delving into new, strange fields of mystery!"

Credits

Lambert HillyerDirector

Boris KarloffDr. Janos Rukh

Bela LugosiDr. Felix Benet

Frank LawtonRonald Drake

Frances DrakeDiana Rukh