Dog Soldier  

Dog Soldier: Shadows of the Past, Quintasan strikes back!, ドッグソルジャー

An American scientist with an AIDS cure has been kidnapped by an arms merchant. This prompts John Kyosuke to come out of retirement and take on the task of recovering the anti-serum. However, he soon discovers that some of those involved are closely related to him, adding a new layer of significance to his quest.