Popp, Crocodine, and Chiu search for Dai. Zaboera also leads his servants to find Dai, causing the parties to clash. Popp rescues Dai, but Zaboera unleashes his Super Spell. Just then, a mysterious shining warrior appears between them and...?
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. At first, Dai dislikes Leona, but they slowly come to understand each other. Suddenly, a giant Evil Scorpion attacks. Dai defeats it, but Leona is poisoned. As Dai's wishes to save her...
A dark power affects Dai's monster friends, driving them berserk. Brass tries to get Dai to leave. As they argue, a Hero trainer arrives to inform Dai that the Dark Lord has returned. To save those he cares about, Dai undergoes Hero training.
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.
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.
Dai and company arrive late at night to the castle town of Romos. The next morning, Crocodine attacks with the Furfang Legion. 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 Anguish Blast. 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...
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.
