Stanley Blindon fantasizes about beautiful woman, but none can compare to his wife Claudia. He is completely obsessed with her. Returning from a trip to Boston, Blindon unexpectedly finds Claudia in bed with another man. Running wildly through the streets, he suddenly turns into a werewolf. He seeks psychiatric help, but the psychiatrist, Dr. Caligari does little to change the situation. Seeking revenge on Claudia, once again transforms into a werewolf. Bursting into her bedroom, he discovers her in bed with Caligari. Machete in hand, the werewolf decapitates Claudia. Caligari escapes, but the werewolf gives chase. When the two fight, Caligari gains the upper hand by producing a pistol. Suddenly, a bright light flashes...