A group of teenage girls are terrorized by Sister Ursula, a nun that believes she must rid the world of all sin. After Sister Ursula mysteriously disappears, the Catholic school is shut down. Many years later, the women, all grown up, are terrorized by a ghostly nun. The daughter of one of the women sets out to find out what happened all those years ago.Years ago, a cruel and merciless nun turned boarding school into a living hell for her students until they could no longer bear the abuse, and she mysteriously disappeared. Now the alumnae are being brutally murdered one by one.