Young Dai lives on Dermline Island, where he dreams of being a Hero. One day, a Hero and his companions come to the island. Dai is excited at first, but their true intent is to steal his best friend, Gomechan, the mythical Golden Metal Slime.
Dai must take Leona to the Earth Cave for a ritual when suddenly they are attacked!
A dark power affects Dai’s monster friends, driving them berserk. Brass tries to get Dai to leave.
A Hero trainer arrives to inform Dai that the Dark Lord has returned. To save those he cares about, Dai undergoes Hero training.
Avan turns into a dragon and attacks Dai. Dai fights back to no avail. To defeat Avan’s flames requires Wave Slash.
As Dai clears his training objective, someone enters the island. Who should appear before Avan but the worst possible being...!
Avan is overpowered by Hadlar, who is now stronger than ever. To protect his students and the world, Avan gathers the last of his strength and faces Hadlar.
Dai can do nothing but watch. Finally, the showdown between Avan and Hadlar is concluded.
After the harrowing events that transpired, Dai says his goodbyes to all his monster friends on Dermline Island and begins his great adventure with Popp.
on Dai and Popps way to King Romos' Castle they save a little girl who was alone in the woods, suddenly an unknown person with a strange weapon appears before them
The party meets Crocodine, general of the Hundred Beast Regiment, who has been given orders from Hadlar, to kill Dai.
Thanks to Maam’s help, Dai goes on the offensive against Crocodine. Popp joins in and the battle intensifies. Seeing Dai and Popp fight, Maam remembers Avan’s words to her when she was young and comes to a decision.
Maam officially joins the party and the three of them make their way to Romos where they cross paths with a familiar group of Hero's...
The All-out attack by Beast King Crocodine, who aims to conquer the Kingdom of Romos, begins!
In Romos Castle, Dai faces Crocodine. Crocodine decides to use the weapon that Zaboera gave him.
Dai is heavily wounded by Crocodine’s Beast King Vengeful Attack. Maam tries to save Dai, but is bound by a Heyedra. Masopho, the Mage from the fake Hero’s party shows this to Popp, who remains paralyzed by fear. Masopho then speaks of his past...
Popp musters up his courage to challenge Crocodine and battles the Beast King one-on-one.
Carrying on Avan's Will, Dai, Popp, And Maam work together as comrades to defeat the general of the Hundred Beast Regiment, Crocodine.
Having won the battle with Crocodine, Dai and company head to Papnica Kingdom, which is under attack by the Undead Legion of the Dark Army. Upon arrival, Dai sees an unbelievable sight. Meanwhile, Hadlar summons all Legion Commanders, but...
At the ruined castle remains in the Kingdom of Papnica, a mysterious swordsman appears. Though a genuine student of Avan, he turns out not to be an apostle of justice, but a faithful servant of the Great Demon Lord Vearn.
Hyunckel dons his Dark Armour Blade "Amudo" to face Dai and his companions. Just why does Hyunckel hate Avan so much? Hyunckel reveals his past with Avan to answer Maam’s question.
Hyunckel repels all of Dai's attacks and retaliates with a combination of the Demon Puppet Grab technique and Bloody Scryed as a finishing blow against Dai, but at that very moment an unexpected new ally appears to save him.
Thanks to Crocodine, Dai and Popp managed to escape. Popp says to Dai that if they don’t defeat Hyunckel, they won’t be able save Maam or Leona. Morning comes. Popp has come up with a plan to defeat Hyunckel and suggests the use of a certain spell.
Dai and Popp sneak into the underground demon castle only to fall into Hyunckel's trap, and are lured to the battlegrounds where they test out their lightning spell they practiced: Raidein!
Hyunckel withstands the Raidein spell. His spell thwarted, Dai falls prey to Hyunckel’s Bloody Scryde. At that moment, Maam appears and hands a Soul Shell found in a hidden room to Hyunckel. It contains a shocking truth about Hyunckel’s past.
Dai desperately continues to fight Hyunckel while unconscious. During Dai's unconscious state he invents a new technique combining both magic with sword.
After their fierce battle against Hyunckel, Dai and friends set out to find Leona. They launch signal flares and are met by Amy of the Papnica Troika, who takes them to where Leona is hiding, but the General of the Fire and Ice Division Flazzard reaches her first...!
Dai faces off with Flazzard. His Magic Sword is effective, but Flazzard summons his minions to create two omnious towers.
Flazzard fires off the rocks in his body in both an attack and a signal to activate the Fire and Ice Barrier. The surrounding area is encased in a field, and Dai’s group is weakened. Flazzard casts an icy curse on the Princess and the group has no choice but to flee.
Matoriv is a Grand Sorcerer living in a cave. At first, he’s resistant to helping, but upon learning that Dai is Avan’s last student, he agrees to help save Leona. Meanwhile, Hadlar’s Dark Army prepares a scheme.
The Party comes up with a plan to save Princess Leona. The Party completes their short training as Baduck finishes his makeshift bombs for destroying the towers. Meanwhile the remaining generals make their move.
Dai and Baduck reach the Dark Flame Spire to find Zaboera, Mystvearn, and their Legion monsters waiting for them. Waiting for Popp and Maam at the Dark Ice Spire is Hadlar. Dai and his friends are in danger. Just then, an unlikely savior appears.
Popp and Maam are shocked by the appearance of Hyunckel. It turns out he was saved by Crocodine. Having come to help the Disciples of Avan, Hyunckel sends Popp and Maam off to Valge Tower and faces off with Hadlar.
Hyunckel and Hadlar's fierce battle to the death continues. Hyunckel on the brink of defeat remembers a forgotten technique Avan once tried to teach him and attempts to use it against Hadlar and his Demon Army.
Dai, Popp, and Maam reach Valge Tower where they are stopped by Flazzard. Realizing he is at a disadvantage, Flazzard shatters himself into bullets of rocks and launches himself as projectiles. Just then, the words of Avan flash through Dai’s mind!
One by one, the Party against Dangan Bakkazan start to fall. However, by Dai's swordsmanship, he learned directly from Avan that he is able to create an explosion with Kuretsuzan. With this knowledge Dai attempts to target Flazzard's core with his minds eye.
With his core destroyed by Dai’s Kuretsuzan, Flazzard splits his body. Mystvearn appears and gives Flazzard the Shadow Legion’s ultimate armour. Flazzard attacks Dai. But having completed his Avan Style Sword Technique, Dai remains unfazed...!
Dai and his friends prepare for their next battle as Papnica rebuilds.
Maam hears the words of Matoriv and comes to a decision, while Popp musters up his courage to tell Maam how he feels. Meanwhile, Vearn’s personal assassin, Killvearn and his companion Piroro appear before Hadlar. What will they say to him?
Dai and Leona head to Bengarna Kingdom to get Dai a new weapon. Freed from her duties as princess, Leona enjoys her shopping. Dai and Popp spend their time amazed by all the new sights. New encounters and new threats await them.
Dai faces the Dragons attacking Bengarna. His sword shatters. Dragons that Popp failed to defeat join in. All prepare for defeat, but Dai unleashes the power of the Dragon Crest.
Nabara and Merle realize a truth that Dai himself doesn’t yet know and takes him to their home Teran Kingdom to learn the truth.
Baran reveals the duty of a Dragon Knight, explains why Dragon Knights were born and then reveals a shocking truth about Dai…!
Dragon Knight Baran informs Dai that he was his child, Dino but despite this Dai faces off against Baran with everything he's got. Baran returns the technique with one of his own ultimate attacks.
With the secret to the Dragon Knights’ supremacy, the “Draconic Aura” deployed, Baran is invulnerable to Crocodine’s attacks. Crocodine continues to stand up to Baran with his newly named attack Beast King: Congenial Attack!
The Party is on the brink of defeat and yet attack Baran together, but Baran forms a plan.
The story is a loose adaptation of the Birth Arc and especially the second one-shot, "Dai Explodes!!!", but it is not directly related to the series and is instead a parallel work not connected to the main one. Additionally, the physical appearance of Hadlar in this film is different from the original comic and later TV adaptations, looking like red evil deity with six arms.
Luca follows in his father's footsteps to rescue his mother from evil Ladja. Finding the heavenly hero who wields the Zenithian sword is his only hope.
Anime ending
