he is an detective who needs to catch you..because of your crimes..but it was too difficult because you were so skilled in your work with disposing all the evidence of your crimes there was just one picture of you on the cctv cameras but not so obvious. untill one day there was one of victims is daughter give the detective kang san an information..and she said "my family has two cars but one of it missing surely the criminal had took one of them mr. detective we should track the car.."