After barely surviving a violent attack by an elusive serial killer, crime boss Jang Dong-su finds himself forming an unlikely partnership with local detective Jung Tae-seok to catch the sadistic killer simply known as K.

• Acemaker Movieworks
• BA Entertainment
• Ma Dong-seok
• Kim Moo-yul
• Kim Sung-kyu
• Heo Dong-won
• Yoo Jae-myung
• Lee Seo-hwan
• Oh Hee-jun
• Kim Gyu-ri