K, Tatsuya, Joon-Oh and Yuuji are best friends. They work for Sung-Ho's gang in a Korean neighborhood in Japan. A power struggle over their territory erupts between their gang and the yakuza.
K, Tatsuya, Joon-Oh and Yuuji try to revenge the death of a gang member, but they are soon chased by the police. As a result, Tatsuya is arrested and the relationship between Joon-Oh and K becomes frosty.
Meanwhile, K robs the yakuza to bail out Tatsuya and Joon-Oh tries to find the snitch in Sung-Ho's gang. They learn that someone is behind the series of deaths of their members. A plan for revenge is set forth.