San Francisco, October 31, 1887, Marabell Heart is born inside a convent. Orphaned at birth, an innocent girl, she is raised up until adulthood when she expects to become a nun and live a quiet sheltered life of service to God. Suddenly she finds her entire life was a complete lie. She is a captive of betrayal and is now pursued by damned souls and demons, both human and supernatural. However, the most dangerous demon she must confront is not one near her, but the one living within herself.