In a feudal yet futuristic Japan, it is said that the one who wields the Number 1 headband is the best swordsman in the world and shall possess god-like powers. Some believe that the Number 1 headband grants immortality. Others believe that the headband had been sent down by gods. The only way to obtain the Number 1 headband is to challenge and defeat the current wearer in combat. However, only the Number 2 can challenge the Number 1 whereas anyone can challenge the Number 2. Thus, whoever wears the Number 2 headband risks constant attack. The Number 2 headband's current owner Justice fights and kills Rokutaro, Afro's father and owner of the Number 1 headband. Afro Samurai witnesses the fight and vows revenge against Justice who tells him to seek him out when he is "ready to duel a god.
