Cecilia, a woman of devout faith, is warmly welcomed to the picture-perfect Italian countryside where she is offered a new role at an illustrious convent. But it becomes clear to Cecilia that her new home harbors dark and horrifying. Sister Mary sneaks into a superior's bedroom at night and steals a ring of keys to escape through the locked gates of a Catholic convent. Four hooded figures capture her and break her leg, then knock her unconscious. Mary later wakes up in a coffin and is buried alive.