A boy survives a devastating monster attack that wipes out his village, catching the eye of an aging noble who sees something extraordinary in him. The old knight names the boy his heir: he is to become the next Prince of Darkness, in a world where the Kingdoms of Light and Darkness have been at war since the beginning of time. Meanwhile, in the sky above, Queen Iris of the Light leads her forces against a rising tide of monsters, even as the King of Darkness below neglects his duty to keep the balance. The new prince comes to believe that the evil threatening the world can only be defeated if Light and Dark join forces. As he and Iris each face the coming doom in their own way, their paths draw closer, and the bond between them may determine what becomes of the world. Adapted from a free-to-play action RPG by Colopl, this fantasy adventure mixes action and romance.