Young, impulsive and adventurous Shu lives a peaceful life in Talta Village, sharing his love of all things mechanical with his friends. But the peace is about to be shattered as two mysterious warriors, Zola and Jiro, arrive. The village is subsequently attacked by the Grankingdom, a land whose sole desire is to take over the world using both Shadow power and machines. With his village hanging in the balance, Shu awakens the legendary Blue Dragon, a Shadow of incredible power and strength.

The Blue Dragon has been awakened–but can Shu control it? He'll need the help of Zola, a shadow wielder who takes it upon herself to educate the boy about shadow powers to tell Shu about Shadow powers, as well as the Book of the Beginning, which tells the story of the battle between Light and Darkness. For Shu and his friend Kluke, there is no turning back, as they are recruited to join Zola and Jiro on a new adventure…

Training under Zola, Shu is eager to prove that he's worthy of being a Shadow wielder, but summoning and controlling the Blue Dragon at will isn't going to be easy. If that wasn't enough, Shu’s rivalry with Zola's companion, and fellow Shadow Wielder, Jiro is growing. But the rivalry is put on hold when a Grankingdom assassin sets his sights on Jiro!

Shu and his comrades wander into a town that has been decimated. A pint-sized Shadow wielder named Marumaro attacks them, convinced that they are enemies. Will Marumaro be convinced of Shu's innocence in time to save the villagers from the real invading army, and taken on a pair of Shadow-wielding brothers at the same time?

Shu and the others take the fight to the enemy when they invade a Grankingdom base where some villagers are being held. But General Logi, the base commander, has a past history with Zola and some shadow powers of his own, and he soon has Zola at his mercy. If there was ever a time that Shu needed to master the Blue Dragon, it's now…

Our heroes are determined to visit Jibral Castle, where they seek the king's help. On the way they stop in a village, where they rescue a waitress named Bouquet, only to find themselves in the middle of a disastrous misunderstanding. Confronted by a monster, they utilize their Shadow powers to fight the beast, but is the monster truly a monster, or is it actually Bouquet's Shadow?