In the small village of Krasniy Kamen, three seventh-graders - Roma, Asya and Gordey - are spending their summer holidays carefree. But one day, while swimming in a flooded copper quarry, Roma finds a magical malachite nugget, which grants him an amazing ability: everything he draws becomes reality. But it turns out that along with the miraculous find, the ancient spirit of the Black Raven mine was released from the depths of the old quarry. He really can fulfill absolutely any wish, but in return he will demand too high a price. Now the guys will have to show strength of spirit and prove that pure thoughts, warmth of hearts and true strong friendship are capable of resisting the terrible ancient evil.