A psychopath's ruthless serial murders have left the entire nation gripped by fear and chaos. An honest, justice-seeking rookie police officer and a veteran detective with a tragic past, face off against the killer. After their encounter with the psychopath, their lives change completely.

• Lee Seung-gi
• Lee Hee-jun
• Park Ju-hyun
• Kwon Hwa-woon
• Gyeong Su-jin
• Woo Ji-hyun
• Jo Jae-yun
• Kim Young-jae