In the Viterbo cemetery, several workers discover an ancient urn chained to a coffin. The urn contains a tunic and several objects belonging to Mater Lacrimarum, the Third Mother, the only survivor of three powerful witches who long ago wreaked terror and death. Her reawakening unleashes mysterious and terrible events that involve American art restoration student Sarah Mandy, who is also the co-worker and companion of the curator of the Museum of Ancient Art in Rome. Sarah will confront the danger with the help of the spirit of her mother, a powerful white witch killed by the Third Mother, an esoterism scholar and a police officer.