Special episodes of "Mouse" which will highlight the hidden narratives in the series that the audience may have missed.

A suspenseful story that asks the key question, “What if we could identify psychopaths in advance?” A crazed serial killer’s ruthless murders have left the entire nation gripped with fear, and chaos reigns. Justice-seeking rookie police officer, Jung Ba Reum, comes face to face with the killer. While he survives his dangerous encounter with the psychopath, Jung Ba Reum finds his life completely changing before his eyes.