In parallel space, next to our world, there is the fairy-tale kingdom of Liverginia. Quite by accident, three fifth-graders who found a magic crystal on a school excursion end up in it. At the very beginning of their adventures, they end up in prison with the toad Spartad, who rules this country. In the cell, they meet a teddy bear, who turns out to be a prince. The guys come up with an escape plan. The next morning, they promise to show Spartad the place where they left the arconium. Spartad has long dreamed of getting it, since its owner becomes a powerful wizard. The guys persuade Spartad to let the Bear go with them. He agrees, but with one condition - one of the boys must remain in the castle. Misha and Petya, together with the Bear, leave to look for arconium and Petya manages to escape to the human world, but the magic crystal remains with Spartad...