Three men who share a past participate in a mixed martial arts reality show where they have to fight against other contestants to win the prize money.
황정민
as Lim Deok-gyu
유준상
as Lee Sang-hoon
윤제문
as Shin Jae-seok
이요원
as Hong Gyu-min
지우
as Lim Soo-bin
박정민
as Young Lim Deok-gyu
Kim Tae-hyung
as Young Lee Sang-hoon
Park Doo-sik
as Young Shin Jae-seok
정웅인
as Son Jin-ho
Lee Jeong-hyeok
as Young Son Jin-ho
강신일
as Director Jo
이철민
as Ahn Yong-cheol
