After inadvertently killing Toru Rikiishi in the ring, Joe Yabuki finds himself aimlessly wandering the city at night, when he comes across a fight between Wolf Kanagushi.

After a long absence, Joe returns to Tange Gym where he is welcomed with open arms. He pays his respect at Rikiishi’s grave and swears to return to the ring.

Joe proves his comeback K.O. victory is no fluke. With his powerful punches, Joe sends his opponents to the hospital one after another. The rival boxing club owners see Joe as a serious threat and band together to get rid of him.