The film follows the story of Maria, a young woman forced into a convent by her family. However, this convent is no ordinary place of worship. It is secretly run by Satanists, and Maria becomes a victim of their twisted rituals and abuse. She is subjected to torture, sexual abuse, and forced to participate in satanic ceremonies. Despite the horrors she endures, Maria finds solace in writing letters to God, pouring out her pain and despair. Eventually, a knight rescues her from the convent, but their happiness is short-lived as they are captured by the Inquisition. Maria is put on trial and accused of witchcraft, ultimately facing a horrific fate.
