Lieutenant Cho, a cop on the edge who, while under investigation for graft and mourning the recent death of his mother, is suddenly put in charge of a seemingly impenetrable mystery. Dismembered corpses are being found in garbage bags around Seoul. However, the surgically-amputated arms, legs and heads are mismatched, rendering the victims nearly impossible to identify. When Cho discovers that all the victims were once romantically involved with the same woman, Suyeon Chae becomes the focal point of the investigation. Growing more suspicious of Suyeon, even as he becomes more entranced by her icy charm, Cho realizes that the secret to the horrifying murders lies in the carefully guarded memories of her past.