The story begins when 13-year-old Baki Hanma faces 100 opponents in a martial-arts battle! He manages to defeat 37 of them, but is disgusted with himself for not beating the rest of them. He goes home and fires his trainer for not doing a good job. He then sets out to fight with tough guys such as Yu Lee, the junior welterweight champion. Baki has set himself on this tough path of self-discipline because he wants to be a tougher man than his father, Yujiro Hanma.