You've only been assigned as a rookie police officer for a few months. Late at night, you were investigating alone. There was no sign of anyone around. The streetlights are sparse, and the shadows stretching at your feet are unnervingly long.

After walking for a while, footsteps began to be heard from behind. Click, clack, at a steady interval. When you look back, a man who looks like a businessman in a suit is standing a short distance away. Thinking it's just your imagination, you start walking again, but the footsteps return.

Whether you turn a corner or stop in your tracks, the man is always behind you, maintaining the exact same distance. When you turn your gaze toward him, he always seems to be either smiling or expressionless.

Should you call out to him as a police officer, or is it better not to provoke him? You should be thinking calmly with your head, yet only the sound of your heart echoes with strange intensity.

Mixed with the night wind, you thought you heard the man's low breathing. Under the next streetlight, you are forced to make a decision. Is this man just a passerby— or is he already looking at you as "prey"?

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