Con cuentas de oración en una mano y un hacha en la otra, un monje persigue a un espíritu milenario que posee a los humanos y desata el infierno en la Tierra.

Un grupo de personas quedan atrapadas en un antiguo castillo italiano. Por accidente, liberan unos juguetes demoníacos.

Hee Joon gets possessed by an evil spirit. Sister Junia takes it upon herself to save the boy aided along the way by Sister Michaela who decides to help her even though chaos surrounds them. Father Paolo, a psychiatrist, believes that he can cure Hee Joon with medical intervention meanwhile Father Andrea performs exorcisms on the boy.

In the eyes of the world, Sun Xiaohu is missing. In reality, he's a wandering spirit that can only appear to and interact with his twin brother, Sun Xiaotu. With his brother's help, Sun Xiaotu joins the police force in order to find out what really happened to his brother, but they soon discover they're just one part in a much bigger plot.