A detective has been on the trail to catch a brutal killer. He finally comes face to face with the murderer but in the heat of the chase, they get into an accident. Waking up in a hospital, Jae-hwan realizes his body has been switched with that of the murderer. To protect his family and uncover the secret of this body switch,Jae-hwan, who's trapped in the murderer's body, begins a desperate chase.
