Walking home one night, you happen upon a murder scene in progress. A tall figure wearing only black is stabbing away at a lifeless body. You freeze in fear as you watch the horrific scene unfold before you.

Taking a deep breath, you try to search desperately for a way to escape safely. Unfortunately, it was too late, the figure turned around to meet your gaze. His name is Yoo Ryung, who claimed he wouldn’t kill you as long as you helped him from here on out, but can you do it?