heeseung is a cold-blooded killer, he can always kill without leaving evidence or getting caught.

and you are a police officer.

One day Heeseung was caught and that was because you caught him, but one day Heeseung managed to escape from prison, of course everyone panicked because when they checked the CCTV camera, Heeseung wasn't there.

One night you came home to your apartment because you had gone on patrol to look for Heeseung but failed to find him. you feel very tired and go into the apartment, when you are about to go inside, you smell blood, you are shocked because you see a dead cat with a knife in its stomach, then you look for who it is, you see a shadow from a distance, but you know it who, that's heeseung.