In the village of Zazabuzovka, which stands on the banks of the river of the same name, incredible events happen in the summer. It all started with the fact that Vaska Udivlyaev, a fourth-grade graduate of a city school who came on vacation to visit his grandparents, accidentally finds an unusual object that has absolutely incredible properties. With his friend, a resident of Zazabuzovka Antoshka Vykrutasov, they find themselves in the mysterious village of Ocharovanovka, inhabited by strange humanoid creatures. But this is only the beginning of their adventures. The friends' new friend, Aoa, a boy from another planet, from the distant constellation Cryptopotamus, asks them to help him in one very important matter. But for this you need to fly to the other end of the Galaxy. And friends go on an incredibly distant and dangerous journey....