On a Christmas Eve, a lifeless body of teenage boy is found. The victim’s revenge-driven twin brother checks himself into a juvie to hunt down the suspects.

High school student Min-sik moves to a rural village with his family. There he meets Ye-joo, a classmate who became a social outcast after her father was accused of murder.

Nicknamed after a human-devouring spirit, the ruthless leader of an overseas black ops team takes up a dangerous mission in a city riddled with spies.