Before you is a new book by the legendary writer Vladislav Krapivin, the patriarch of Russian science fiction, on whose romantic and poignant works more than one generation of readers has grown up. On one of the faces of the Great Crystal the wheel of the Gyroscope spins - the stabilizer of the slowly growing space of the Institute courtyards, where there is no entry for evil , violence and other abominations. An attempt to influence the Gyroscope in order to quickly increase the territory of the “space of good” fails... And all that remains for the heroes is to try, with the help of a squadron of chess horses, to make sure that the wheel never stops.