Rikio Ishikawa, a member of the Kawada yakuza family in Shinjuku, assaults and steals money from the Aoki gang, members of the rival Shinwa family from Ikebukuro, for operating in their territory. Ishikawa then robs a ''Sangokujin'' gambling den with Imai, whom he had become friends with in prison and whom asks Ishikawa to join his gang, he stashes his gun with a geisha named Cheiko. After being released from jail that night, he returns for the gun and rapes her.