A group of criminals whose diamond heist goes wrong retreat to a WWII era bunker where tensions begin to rise.

Takashi, who took the blame when his father shot a gangster, returns home after serving a four-year sentence, only to find it infested with yakuza running a dope ring. Battling gangsters all the way, Takashi searches for his former girlfriend, now a drug addict.

Agent Jiro Kitami attempts to stop a smuggling ring from shipping arms to Vietcong guerrillas.