An Eye for an Eye and a Hole for a Hole

Kenji, the young head of the Kato Yakuza organization, just got out of jail. He comes home and finds out the opposing Sawaki yakuza is invading Kato's territory. Sawaki recruited Ikeyama and asked him to kill Kenji, but Ikeyama was Kenji's lover who exchanged the cup of brothers in jail.