A boy named Hee-Joon (Moon Woo-Jin) becomes possessed by an evil spirit. People around him struggle to save him. Nun Yunia (Song Hye-Kyo) takes action to save the boy, who is overwhelmed by powerful pain and she never gives up on the boy. Nun Mikaela (Jeon Yeo-Bin) takes an interest in Nun Yunia’s actions and decides to help her even though everything is in chaos around them. Priest Paul (Lee Jin-Uk), who is also a psychiatrist, believes that he can cure Hee-Joon with medical treatments. Priest Andrew (Heo Jun-Ho) performs an exorcism to expunge the evil spirit from the boy Hee-Joon.
%20becomes%20possessed%20by%20an%20evil%20spirit.%20People%20around%20him%20struggle%20to%20save%20him.%20Nun%20Yunia%20(Song%20Hye-Kyo)%20takes%20action%20to%20save%20the%20boy,%20who%20is%20overwhelmed%20by%20powerful%20pain%20and%20she%20never%20gives%20up%20on%20the%20boy.%20Nun%20Mikaela%20(Jeon%20Yeo-Bin)%20takes%20an%20interest%20in%20Nun%20Yunia's%20actions%20and%20decides%20to%20help%20her%20even%20though%20everything%20is%20in%20chaos%20around%20them.%20Priest%20Paul%20(Lee%20Jin-Uk),%20who%20is%20also%20a%20psychiatrist,%20believes%20that%20he%20can%20cure%20Hee-Joon%20with%20medical%20treatments.%20Priest%20Andrew%20(Heo%20Jun-Ho)%20performs%20an%20exorcism%20to%20expunge%20the%20evil%20spirit%20from%20the%20boy)
