Filmmaker José Mojica Marins travels to spend Christmas with friends in a small farm, where they spend leisure time while Mojica writes the story for his next film. However, he observes eerie things in the house, with his friends being possessed one by one by some supernatural evil force.

Dr. George Medeiros, a brilliant scientist, is badly disfigured when his wife takes a lover and plans to murder him. After months in the hospital, he returns with nothing in mind but revenge.