In the small village of Krasny Kamen, three seventh—graders ― Roma, Asya and Gordey - are spending their summer holidays carefree. But one day, while swimming in a flooded copper ore quarry, Roma finds a magical malachite nugget that grants him an amazing ability: everything he draws becomes reality. But it turned 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 to pay too high a price. Now the guys will have to show fortitude and prove that pure thoughts, warmth of hearts and true strong friendship are able to resist the terrible ancient evil.
