A devil worshiper tries to seduce a young innocent.

Oliver Haddo, a student of the occult, demonstrates on numerous occasions his powers of magic and after years of search finds a formula in a Paris library for the creation of human life. Margaret Dauncey, the niece of Dr. Porhoet, is a sculpture student and is injured while working on a huge faun. Dr. Arthur Burdon, a noted American surgeon, performs a delicate operation on her spine before many famous doctors, including Haddo; and during her convalescence, Margaret and Dr. Burdon become romantically involved. By trickery Haddo gains entrance to Margaret's apartment and puts her under a hypnotic spell. Burdon follows them to Monte Carlo, but she is irretrievably under Haddo's power. In the Sorcerer's Tower, Haddo is about to extract her virgin blood for his secret formula, when Burdon and Dr. Porhoet arrive and overcome him; Haddo falls into a fiery furnace, and the tower is destroyed, freeing Margaret from the spell.