A party is being held to celebrate the village having been saved from the hands of the Steng and his mamodo Baltro. During the party, Kiyo fills his father in on the situation to date. Kiyo learns from his dad where in the forest he first found Zatch, and decides to go there to probe Zatch's past. His father tells him he should be very careful because spirits have apparently been appearing in the forest recently. The next morning, Kiyo and Zatch waste no time in heading out to the forest. However, in the village just prior to the forest, the two of them encounter a strange sight. The fields have been laid to waste, the waterways are dry and the very moment the villagers see Zatch's face they are so filled with fear that they flee. Just then, the tour bus in which Megumi and Tia are riding appears. They tell Kiyo and Zatch that they happened to catch a glimpse of a boy who looked very similar to Zatch just minutes ago. When he hears this, Kiyo remembers the words that Robnos fired off just as he vanished. Is it possible that the guy is around there somewhere? Kiyo and Zatch enter the forest and encounter Professor Dartagnan, who is dressed as a wood spirit. Kiyo and Zatch learn from Prof. Dartagnan that a mysterious and massive explosion took place in the forest 6 months ago, and ask him to guide them to the epicenter of that explosion. However, Zatch's body starts to glow immensely the moment they arrive at the location. After the light subsides, Zatch begins to relate to Kiyo those fragments of his memory that he recovered. When Zatch first came to this world from the world of mamodos, he was unable to find the owner of his book, and lived for a long time in this forest. One night, a boy with a face identical to Zatch's appeared, spoke of the bitter grudge he held against Zatch and unleashed the Zaker spell, which caused Zatch's memory to vanish
then departed. Able only to recover a small part of his memory, Zatch cannot remember who this other boy is. Just as Kiyo manages to cheer Zatch up, the book illuminates and the 4th Spell appears
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