A bullied teenager who is locked up at a juvenile detention center due to an unexpected accident, meets a mixed martial arts champion to break through his own limits.

• SLL
• TVING
• Kim Min-seok
• Wi Ha-jun
• Jung Won-chang
• Lee Jae-kyoon
• Bae Myeong-jin
• Lee Jung-hyun
• Cha Yeob
• Shin Min-jae