When Nick Davis leaves prison after one year in solitairy, he is hired to operate a forklift in a warehouse in the harbor owned by the Japanese Yakuza patriarch Isshin Tendo. The place is assaulted by the Italian Mafia lead by Dino Campanela and Nick rescues and saves the life of Shuji Sawamoto, who is the representative of Yakuza interests in America. Shuji hires Nick to work for Yakuza and becomes his godfather in the family after his oath to join Yakuza. However, Nick is a lonely FBI undercover agent assigned to penetrate the criminal organization. When the FBI discovers that Campanela is organizing a massive attack to destroy the Yakuza, Nick's boss Littman calls off the operation to leave the dirty work to the Italian Mafia. But the connection of Nick with Shuji and his goddaughter Yuko forces him to help his Japanese family.

After losing an election to become chairman of the Wo Lin Shing triad, a gang leader lashes out and tries to seize the dragon-head baton, the official symbol of a chairman's authority.

After being released from prison, Tang Kat-Yung exacts revenge on Lee Ah Chai.

Mainly the story of Sai, a rascal who works at a gang-operated nightclub, and his conflicts with a rival gang.