It is an original fighting novel featuring Bunshichi Tanba, a wandering fighter who studies karate and various other martial arts. After being defeated by a young professional wrestler, Kajiwara Toshio, Tanba vows to take revenge by training himself for six years to avenge his humiliation. Tanba then gets caught up in the tide of the fighting world, which has begun to change drastically, and fights against various powerful opponents. In addition to these fighters, there are other fighters who pursue the strongest, such as Matsuo Shozan, the director of the Hokushinkan full-contact karate school, and Great Tatsumi, the president of Toyo Pro Wrestling.