Newlyweds Shane and June Brown come to Paris for their honeymoon. But Shane's thoughts are far from romance - he became a victim of reckless experiments of French doctor Leo Semeno, who studied the peculiarities of sexual desire in people, as a result of which he now wants to eat his wife. He hopes to find the scientist, but fate confronts him with Cora, Leo's wife, who is afflicted with the same terrible disease.