When a movie star dies mysteriously, insurance investigator Jeff Keenan (Rod Cameron) is put on the case. It seems that the dead man was attending a private psychiatric clinic on the Riviera. Keenan learns that one of the staff doctors has been tinkering with an experimental "dream machine," designed to soothe his more disturbed patients. But Paul Zakon (Peter Illing), the ex-Nazi owner of the clinic, has been using the machine for brainwashing purposes. There's really no "monster" to speak of, but there's plenty of Frankenstein-style electric bolts and sparks in the climactic melee. Charles Eric Mayne adapted the gimmicky screenplay from his own novel.