In the village of Krasny Kamen, three seventh graders — Roma, Asya and Gordey ― are spending their summer holidays carefree. On one of his trips to the quarry, Roma finds a malachite nugget, with which his drawings become reality. But along with the miraculous find, the ancient spirit Black Raven emerges from the depths of the quarry, which embodies any desire and in return demands to pay too high a price. Now the heroes have to prove that pure thoughts and true strong friendship are stronger than the ancient evil.