| EPISODES | 20 (1 season) |
|---|---|
| ORIGIN | Korean / South Korea |
| AUDIENCE | PG-13 |
| A psychopath's ruthless serial murders have left the entire nation gripped with fear and chaos. A honest and justice-seeking rookie police officer and a veteran detective with tragic past, face against the killer. After the encounter with the psychopath, their lives totally change. |
