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 manage to protect the village from the enemy. The ‘Knight Master’ (Zola) convinces Shu to come along on their journey.

Shu and his friends arrive at Jibral Castle, where rumors about ghosts are spreading like wildfire. When a member of Zola's party becomes a prime suspect, the group takes it upon itself to solve the mystery, leading to a confrontation with Salinas, an enemy Shadow wielder.

Zola's group arrives at the Republic of Metia, the nation next to the Grankingdom. From there they hope to cross through a canyon into the Grankingdom, but General Logi is ready and waiting with an ambush. With the formidable Shadow wielders Gilliam, Cynthia and Lemaire against them, Shu and his friends find themselves in dangerous combat.

Shu finds the gang and and now is in the Grand Kingdom's capital city. While that, Grand Kingdom's army is fighting Jiburaro Kingdom's army. Shu Nand the others get inside Nene's place(nene is a villain). While Shu and the others are finding Nene, they discover that Nene is planning to take out children's shadows and using them as their weapons.

Shu's informant Homeron is gathering information about the Extra Seven. Shu and Co. arrive at Flame Phoenix ruins. When Kluke disappears, she ends up in the area where she first encountered her Phoenix shadow and asks it how she can call upon its power again. Phoenix tells Kluke that the answers lie in herself. Kluke then receives a necklace and rejoins Shu and Co. When they find Jibral's scattered army being attacked, Shu and Co. join the battle. Upon defeating the robotic soldiers and their shadows, Shu and Co. are soon attacked by a giant robot. Kluke brings out her Phoenix Shadow to use its barrier to protect everyone enough for Shu to use Blue Dragon to destroy the giant robot. Meanwhile, Homeron receives news the mysterious woman who stole the Extra 7 is heading west.

Nene's flying fortress invades Raqueeva. When General Szabo questions Nene about General Logi's activity, Nene tells him to let General Logi handle Shu's group. On the trail of Logi's ship, Shu and Co. end up in battle with the Independent Flying Squadron again. This time, they've all been equipped with Power Boosters to make them more powerful and are instructed to fight them even if it is to the finish. Zola and Marumaro fight Gilliam, Todd, and Bishop while Cynthia and Schneider attack Shu and Co.

The battle against Logi's Independent Flying Squadron rages on as Shu, Kluke, Jiro, and Bouquet struggle to take down Cynthia while Zola and Marumaro do the same for Gilliam and his minions. When Marumaro takes down Bishop, he and Zola focus on the remaining two when Gilliam and Todd's Power Boosters overload. When this is discovered, General Logi orders Cynthia, Gilliam, and Todd to retreat, but Gilliam and Todd are shot down by Zola after Marumaro decoyed them. Despite Cynthia going into overdrive, she is defeated by Jiro anyway.

Shu and Kluke continue their fight with General Logi and Valkyrie. Marumaro is knocked unconscious by the attacks launched by Schneider's Isabel and Andropov's Alubujem. Luckily, Zola arrives to help Jiro. Meanwhile, Bouquet uses her invisibility to sneak onto Logi's ship and reclaim the Extra 7. Kluke falls unconscious after an attack that breaks Valkyrie's shield. The Blue Dragon's battle with Valkyrie breaks the glass that's holding the pages. An invisible Bouquet seizes them but runs into Delphinium. Logi and Valkyrie manage to bring down Blue Dragon, but Shu gets enraged enough to bring Blue Dragon up to a powerful level. Andropov and Schneider manage to get Logi out of there at the last minute. Debris from the battle makes a hole in the ship as Bouquet manages to make her escape through it only for Delphinium to use her shadow to snatch back the Extra 7 at the last minute.

Zola has been defeated while Marumaro and Saber Tiger free Kluke, Phoenix, Bouquet, and Hippopotamus. Shu and Jiro have Blue Dragon and Minotaur attack Nene. Nene combines the Chimera clones to form one large Chimera. Meanwhile, General Logi has dispatched his troops which will attack when Schneider and Andropov receive the command from General Logi. Nene uses Chimera's Dark Symphony attack which weakens his opponents. When Shu and Blue Dragon's attacks are countered by Chimera's attack, Shu falls unconscious. In a dream sequence, he encounters Lt. Dragnov and Homeron. Marumaro and Kluke are defeated as Jiro has Minotaur aim for the device on Chimera's forehead. Shu rises from his boulder grave for another bout with Nene. Assisting Jiro and Minotaur in attacking the crystal on Chimera's forehead, Shu and Blue Dragon learn that the crystal enabled Chimera to alter his elements. The limiter is unleashed as Nene and Deathroy merge with Chimera to form an amalgam of all three of them. With Jiro defeated, Shu uses every ounce of his power and manages to destroy Nene as Deathroy is shown lying on the ground. With news of Nene's defeat, General Logi gives the command and has Schneider take over Castle Des La Teste while Andropov attacks some Gran Kingdom airships. This is General Logi's act of his secession from Gran Kingdom which he announces.

The final battle arrives between Shu and the more powerful demon Zola. After Shu defeats Zola everyone begins the resealing of the darkness. But they learn that in order to free the world of darkness, a sacrifice of the shadows must be made. So everybody uses up every last drop of energy that their shadows possess and they reseal the darkness. The world returns to normal, and everyone resumes their normal lives.

Two years after the world is freed from darkness, a young dragon escapes and crashes to earth. Shu and Bouquet have joined Legolas' Sarbin resistance against General Logi. Shu leads a supply raid on a Rosekstan airship, then rides with Bouquet to investigate the crater, and encounter a mysterious boy named Noi. All three find themselves prey to a Rosekstan fleet. But a red dragon appears and decimates the Rosekstan forces. While evading the red dragon, Noi uses his Tosen Kyuden ability on Shu. With Noi's help, the Blue Dragon returns. After a fierce battle, Shu and Blue Dragon cause the red dragon to retreat.

Kluke uses Phoenix's ability to teleport the group to General Logi's hideout. When Shu shouts for a meeting with General Logi, he manages to allow it since he noticed Andropov with them. While Shu and Co. are talking with General Logi, Delphinium and Deathroy infiltrate General Logi's hideout looking for info that will help the White Guardians. As Shu and General Logi continue their conversation, one of Logi's men enters informing them that the White Guardians is attacking the Rosekstan forces. General Logi and Matilda leave as Andropov goes after them. As Delphinium and Deathroy find a room with giant exo-suits, General Logi talks with Andropov where the General still supports Andropov when he feels bad about what happened to Schneider. Shu and Blue Dragon leave to help the forces of Rosekstan fight the forces of the White Guardians. Blue Dragon destroys their Brunacks upon arrival. Outside of General Logi's hideout, Noi notices the White Guardians forces approaching in large numbers.

Rosekstan begins their attack on Rudolph's war machine. Rudolph then unleashes his winged creatures, a bunch of Amethyst Dragons, a Moody Dragon, and a Phantom Dragon. Jiro, Kluke, Marumaro, Bouquet, Andropov, and General Logi unleash their shadows to attack the war machine while Noi looks for Shu. Meanwhile, Shu makes contact with Zola's spirit. As the battle progresses, Rudolph's war machine decimates most of the Rosekstan fleet. Just as one of the winged creatures is about to attack Jiro, he is saved by Delphinium and Deathroy (who have unleashed Chimera) as they arrive with reinforcements. Sleipnir fires its cannon at Rudolph's war machine but to no avail. Rudolph then fires the attack which decimates more Rosekstan airships as Noi charges towards the war machine.

Things aren't looking good for Rosekstan and Shu's allies. Just then, the Shu/Blue Dragon emerges with Primella in its hand. Primella wakes up as she is given to Dr. Tarkovsky and General Szabo. Rudolph emerges from the war machine and fights the Shu/Blue Dragon. They match blow to blow until Rudolph uses his intangibility to keep the Shu/Blue Dragon from hitting him and then multiplies to attack the Shu/Blue Dragon. With help from Primella, the Shu/Blue Dragon destroys the duplicates. The Shu/Blue Dragon collides its punch with Rudolph's punch. The hopes of Shu's allies, Marumaro's siblings, and even the thought-dead Conrad, Griz, and Daner help give the Shu/Blue Dragon the strength to fight Rudolph. Their combined attacks results in an explosion that destroys the winged creatures and the dragons that Rudolph had summoned. As the Shu/Blue Dragon falls to the ground, Rudolph starts to crack up and explode taking his war machine with him.

Noi reveals himself to be one of the 'Investiture Beings', but keeps it from Shu and the others to keep their trust. The battle with Shu and Mikhail rages on again with Mikhail unleashing his Red Dragon shadow even when Marumaro and Saber Tiger throw themselves in front of Mikhail's attack. Mikhail reveals his true form as the Red Dragon itself. Meanwhile, Lotarus notices the soldiers in white approaching. The warriors Vermillion and Furioso watch the fight recapping about Primella's prediction of Albarose' destruction when Dr. Tarkovsky appears identifying the Red Dragon as Mikhail as their tri-barrel technological weapons get positioned. Mikhail ends up overpowering Blue Dragon in fusion form. Shu refuses to give up when Mikhail starts attacking Noi for breaking the rules of the Investiture Beings. Then Noi transforms into his black dragon form, revealing himself in front of Shu and initiates the forbidden fusion with Blue Dragon to gain a new dragonite form and evening the odds with Mikhail. During the fight, the soldiers in white step in firing a tri-barrel weapon called the Brunack causing Mikhail to flee. The soldiers corner Shu and co. as Vermillion introduces them as the "White Brigade" and stated that their mission were absolute destructions of all shadows.