When impulsive Rebel Hannah goads her friends into summoning a demon for some hellish hijinks, the gang are totally bedevilled by what they bring to Earth. It's a demon alright, but one in training who needs help to "earn his devil horns".

Un solitario vagabundo que sufre una pérdida parcial de memoria acepta un trabajo para cuidar a una mujer con problemas psicológicos en una casa abandonada en una isla aislada.