The son of a former Japanese samurai and a Native American tracker, Isamu's parents were killed by racist crooks, and he was taken in by a highly sought after outlaw. Isamu has the potential to become the best gunslinger in the Wild West, but can he survive what comes before him?

A early popular work of Weekly Shonen Jump, and a Gekiga adaptation of a popular emonogatari titled "Wild Boy" (荒野の少年).