Set 15 years after Dragon Knight III, our hero Takeru along with Luna has finally settled down. All is at peace until a mysterious force from another time invades Takeru's world. And so, request for his help along with his allies has been sent.

Takeru thinking it a good opportunity decides to send his son Kakeru on this adventure instead of himself. In retaliation for Takeru's decision, his old comrade Baan sends along his own son Sail to accompany Kakeru.

With the torch passed from father to son will Kakeru and Sail make their fathers proud?