Psychiatrist Dr. Cheon and his assistant In-bae travel all over the country to perform fake excorcism. One day, a mysterious woman visits him, asking him to treat her sick sister after seeing his exorcism online. The pair heads to an eerie village and meets the little girl, only to realize that she is truly possessed by a superhuman being. Upon some research, they find out that a deadly being known simply as the Mage has a special ability to control people like puppets, but indoing so, they've put themselves in the Mage's crosshairs, and they must now defend themselves for their own lives.