Kaioh rides with Lin to the boiling magma "Swamp of Demons" and site of the "Pillar of Evil", seeking to recharge his evil fighting spiritual energy. When Kenshiro arrives for their last fight, Kaioh describes the death of his mother while saving Kenshiro and Hyoh when they were children, which caused him to abandon all love and affection, embrace evil, and seek revenge against the Hokuto Shinken Clan...