Anna Winter, a young woman recovering from a troubled past and a long goth phase, moves out of her rental house into a beautiful new home thanks to her new husband Mike. Because of Anna's tough past, she can't help but feel unworthy of the wonderful life she has now. The day they move out, Anna sends her family off as she finishes things up at the rental house. Just as she tries to leave, the spirit of a deranged Nun stuck in purgatory, Sister Catherine, wants Anna's spirit to stay in the house with her. Sister Catherine locks her inside and uses paranormal violence and visions of Anna's past to try and kill her so that her spirit will stay in the house with Sister Catherine for eternity. As the battle wages on, we learn more of Sister Catherine's sinister motivations and Anna's troubled past.