Erica, who had fallen off a cliff and died, was revived by her father using the power of light to block the demon. However, because of this, the demon escaped from its shackles and wreaked havoc on the world. A stranger who accidentally ran into the land of Ahura inadvertently assumed the important task of fighting alongside Erica to save the world. The two also met and fell in love with each other in the constant battle, and even forgot their mission...