Bramford School for Girls students Rose and Kat (Kiernan Shipka) find themselves snowed-in at the prestigious institution when their parents fail to collect them for break. Dark, horrific visions begin plaguing Kat while Rose watches in horror as the young girl becomes enraptured by an unseen evil force. Meanwhile, beautiful but damaged Joan (Emma Roberts) is on a mysterious mission towards the school, seemingly compelled by the dark forces at work.