
Near the end of the 19th century, Prof. John Mayer and his assistant, the scientist Dr. Isabel Reed, accidentally invent a powerful ray. An alien travels to Earth to destroy the machine since it would be a threat to the universe. He initially possesses the mind of Thomas, a sex maniac and serial killer, to get close to Mayer during the demonstration of the machine to scientists and the military. Mayer's niece, Laura, meets an acquaintance of her uncle, the chemist Dr. Paul Rosten, and Mayer invites him to join the research. When Thomas gets close to Mayer, the alien also possesses his mind in order to destroy the device and his notes. Meanwhile, Thomas is not able to control his murderous impulses and attacks several women with a straight razor.

as Prof. John Mayer

as Dr. Paul Rosten

as Laura

as Dr. Isabel Reed

as Thomas

as Nancy

as Prostitute

as Alien

as Deaf-mute victim

as Gen. Nord

as Villager

as Villager

as Villager

as Martha - mayor's wife

as Visiting Dignitary
