After Yaiba loses the Thunder Orb during an intense duel with Onimaru, he sets out on a journey to find other legendary Orbs that will grant him new powers. Yaiba and his friends cross the sea to Shikoku, where Yaiba struggles to seize the Water Orb. Then it's off to Mount Aso in Kyushu, where a powerful sorcerer is waiting for them. Meanwhile, Onimaru is furious that his own Fujinken was shattered in their battle and can't be repaired, so he hatches a plan to revive cursed warriors and steal Yaiba's Raijinken for himself!