Conducting weird scientific experiments, mad scientist Dr. James Brewster, aided by his colleague Dr. Randall, has managed to transform himself into a hairy, stooped-over ape-man. Desperately seeking a cure, Brewster believes only an injection of recently-drawn human spinal fluid will prove effective. With Randall refusing to help him, it falls to Brewster and his captive gorilla to find appropriate donors. Starring Bela Lugosi, Louise Currie, and Wallace Ford. Is it a gorilla, bigfoot or a mad scientist? A great retro-bigfoot-ape-man film!