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After the stunning adventures described in the novel The Starry Files, the members of the Science Fiction Research Club from the Ukrainian town of Hremenets return home. The usual school life begins. But something bad is happening all over the world. And the fantasists, despite all the prohibitions of adults, find themselves once again in a whirlwind of new dangers and discoveries. And with each of them, they get even closer to unravelling the mystery of their planet. Which, however, is not quite a planet. Because the secrets are not really its own either.