After yakuza boss Kurata dissolves his own criminal empire, a rival kingpin offers a position to Kurata's top operative, Tetsuya 'Phoenix Tetsu' Hondo. When the fiercely loyal Tetsu declines, Otsuka taps unstoppable Tatsuzo the 'Viper', a ruthless gun-for-hire, to assassinate him. As the Viper trails his target through the countryside, the agile Phoenix Tetsu grows concerned that one of his former associates has betrayed him.