In a bygone era, a revered swordsman known as 'the hero' combatted a malevolent demon plaguing the people. Through unity and strength, the hero and his allies vanquished the demon, bringing peace to the island. Years later, the demon resurfaces, prompting Dai, our modern-day protagonist on a tranquil southern island, to aspire to heroism. Learning of the demon's return, Dai and his comrades vow to thwart its plans and the dark power behind its revival. In this quest, Dai unravels the hero's true identity, uncovers the sinister force at play, and awakens his latent abilities in the face of danger.