After escaping a savage kidnapping, earnest girl of science Marti Zaroni goes to her wealthy Uncle Zito for protection instead of the police. She wants him to stop the diabolical men who took her captive and to rescue the unwitting boy who aided in her escape. Zito's godson and right hand man, the handsome Angelo Merona is pleased to see her. He's been in love with the stubborn Marti for years and will do everything he can to help her but first has to deal with his mother, who believes she's possessed by a demon that has plagued their two families for centuries. Angelo doesn't have to worry, according to legend because of his unusual green eyes he's blessed and no demon will touch him. But everyone around him is fair game Marti learns as she bravely decides to take on her abductors herself.