Zatch manages to catch the thief whose name is Kory. Kiyo seeing a wound on Kory's arm takes him along to Kiyo's father's university where a doctor can look at it. They enter Kiyo's father's office only to find it in shambles. Kiyo notices a flower on the ground and Kory reveals it's a flower of the dark lord's. He reveals that a dark lord is residing in a castle and kidnaps people from the village when they do not meet his demands. Folgore soon arrives and accompanies Kiyo to the castle. Kiyo and Zatch manage to overcome the traps in the castle and reach the final room. Steng, the man living inside the caste, reveals his giant armoured Mamodo Baltro. Seemingly invincible, Kiyo realizes that the Mamodo's ability is to manipulate armor by using flowers and reveals the Mamodo is actually inside the giant armor. Steng reveals that he has Folgore and Kanchome hostage and if Kiyo attacks, he will kill them.