A boy named Shu is obsessed with knight masters learns that one has appeared in his village. Shu gets excited at this possibility and goes in search of him. His village gets attacked after finding the "knight master". Shu unleashes his true power after finding his friends are in trouble.

Shu and the others have finally found Nene. Shu, Jiro, and Marumaro fight Nene while Jiburaru's army is having a hard time fighting Grand Kingdom's army. But then, Shu, Jiro, and Marumaro got to a big disaster and Zola needed to get in.

Shu and Co. encounter Homeron again. He reveals that the information of the Extra 7 is somewhere in Gran Kingdom's Castle Des La Teste and they will have to infiltrate it to get to its master computer. Conrad L. Lawrence is shown to be imprisoned in a local prison run by Cynthia which Homeron also tells Shu. Zola comes up with a plan to lure the guards from Castle Des La Teste in order to rescue Conrad and get the information. As the others attack the prison, Homeron, Kluke, and Bouquet infiltrate the castle. Upon rescuing the captive soldiers, Shu and Jiro free Conrad and run into Cynthia. Lemaire also arrives to help Cynthia and both of them begin to overwhelm Shu and Jiro until a successful attack from Blue Dragon and Minotaur weakens them down. Zola catches up after destroying the robots that came with Lemaire. With the reinforcements from Castle Des La Teste approaching, Zola issues a retreat as Homeron begins his infiltration.

Shu and Blue Dragon are sent to the nearest town to find a blacksmith to make a replacement part for the Mechat and also to get supplies. On their way to the nearest village, Shu and Blue Dragon save a boy named Tonto from local bandits whose jewels were taken from Tonto. Upon arriving in the village, Shu meets Tonto's sister who happens to be a blacksmith. Shu has some trouble when Tonto steals tomatoes, potatoes, and apples from three local farmers and Shu had to pay for those. Shu and Tonto get into trouble with Tonto's sister when she finds out that Shu is a Shadow Wielder and Tonto had been stealing again. After dodging her hammer before she collapse in sorrow, Shu learns that Tonto's sister hates Shadow Wielders after recurring attack by Shadow Wielders from Gran Kingdom. When asked why Tonto wants to become a Shadow Wielder, Tonto's sister states that Gran Kingdom returned last year with Ivanov and Gustav demanded tribute. Shu and Tonto's sister get word from one of the farmers that the local bandits have captured Tonto. Shu and Tonto's sister managed to find their hideout as the bandits use a tank and robots they stole from Gran Kingdom to attack Shu and Blue Dragon. Due to Tonto's sister not liking Shadow Wielders, Shu is easily taken down by the bandits and Blue Dragon causes them to retreat. After recuperating, Shu finally gets that replacement part for the Mechat and defeats the bandits before rejoining with the others.

At a Rosekstan base, General Logi oversees the upgrades to the giant exo-suits while on Sleipnir, Matilda is given the status on the giant wall. Rosekstan's forces still try to breach the wall as Shu, Bouquet, Marumaro, and Noi arrive at the nearest village. Matilda resolves to use a powerful laser that would guarantee the wall's destruction at the price of the nearest village. As Saber Tiger is riding the others toward the giant wall, they are ambushed by Matilda and the exo-suit warriors. Not wanting Matilda's plan to happen, Shu unleashes Blue Dragon as Matilda unleashes Zephyrus.