A man who was once an exorcist, suffers until he faces a demon that is freed. The night exists between real and unreal, their struggle to stop the resurrection of the demon has begun!
About two and half millennium ago, two mysterious beings that tormented humans were locked up in 2 caskets. They are required to infiltrate 7 weak human hosts to assume their form. After a few centuries, Monk Ha-jung (Lee Eol), the protector of one of the caskets, realizes that one of the beings has reawakened and so he asks monk Chung-seok (Nam Da-reum) to seek Park Jin-soo (Lee Sung-min), who was born to stop these beings. Jin-soo begins the hunt to find the being with Chung-seok in order stop ‘it’ from causing havoc on the earth.