In the small village of Krasny Kamen, three seventh-graders — Roma, Asya, and Gordey — are enjoying their summer vacation. However, while swimming in a flooded copper mine, Roma discovers a magical malachite nugget that grants him an extraordinary ability: everything he draws becomes a reality. However, along with this miraculous find, the ancient spirit of the mine, the Black Raven, is unleashed from the depths of the old mine. While the Black Raven can indeed fulfill any wish, it comes at a high price. Now the heroes must show their strength of character and prove that pure thoughts, warm hearts, and true friendship can stand up to a terrible ancient evil.