Undergroundlife of Seoul. Fight groups, fighting, drinking, fighting again... This is the life of Kwon Ji Yong. He is the leader of the leading fight group named Red Tiger. Life is easy, because everything is OK. But it changes when the leader of worst opponent commits suicide and Ji Yong knows the new leader. Knows too well. 

Kwon Ji Yong, 26

Leader of Red Tiger.

Dong Young Bae, 24 Team : Red Tiger

Right hand of Ji Yong. Doesn't drink alcohol.

Lee Seung Hyun, 24 Team: Red Tiger

Ladies man. Expert at melee attacts. Familiar with police.

Choi Joon Hong, 18 Team: Red Tiger

Under-age, can't buy alcohol, but drinks it. Red Tiger calls him Zelo.

Moon Jong Up, 25 Team: Red Tiger

Expert at martial arts. Best fighter of Red Tiger.

Woo Ji Ho, 24 Team: Red Tiger

Left hand of Ji Yong. Leader, if Ji Yong leaves the group. Nickname: Zico.

Kim Yu Kwon, 22 Team: Red Tiger

The only gunner in the Red Tiger. Likes to play around, but can be serious too.

Lee Tae Il, 22 Team: Red Tiger

Spends his time in Red Tiger's combat training room. In fights, has his place next to Ji Yong.

Bang Yong Guk, 24 Team: Black Dragon

Was the leader of Black Dragon, but commits suicide. 

Lee Chae Rin, 25 Team: Black Dragon

Was the wife of Ji Yong. Is now the leader of Black Dragon. Boyfriend: Choi Seung Hyun

Kim Him Chan, 22 Team: Black Dragon

Jung Dae Hyun, 23 Team: Black Dragon

Yoo Young Jae, 23 Team: Black Dragon

Ahn Jaye Hyo, 24 Team: Black Dragon

Lee Min Hyuk, 23 Team: Black Dragon

Nickname: Bomb

Park Kyung, 24 Team: Black Dragon

Expert with knifes.

Pyo Ji Hoon, 25 Team: Black Dragon

Choi Seung Hyun, 25 Team: Black Dragon

Boyfriend of Chae Rin. Sniper of Black Dragon.

Kang Dae Sung, 23 Team: Black Dragon

Laughs very much and usually wears white. Expert at martial arts.