Once, sixth-grader Kostya gave in to his classmates’ blackmail and began to steal, using his unusual ability to see and attract valuable things. When they caught him, the boy learned that he is a Koshchei—one of the Lomorier people—beings who have the abilities of storybook and epic heroes. To teach teenagers to control their gift and not use it for evil, a special closed school was created. In the Tridevyaty Lyceum, Kostya gets a chance to learn the fate of his parents, and together with his new friends he sets off in search of the legendary repository of magical artifacts, not suspecting that forces watching them closely have their own sinister plans.