Kolya and his mother are going to the Tretyakov Gallery. Kolya loves to draw, but he's worried he'll get bored among the complex and incomprehensible 'adult' paintings. However, the excursion turns out to be more than just interesting—it turns into a thrilling adventure! Especially since Kolya and his mother are joined by the impulsive rook Fanya and the Martian robot Booth, who has come to Earth to understand the mystery of human emotions. Together with the book's characters, young readers will discover key masterpieces of Russian fine art on display at the Tretyakov Gallery and admire reproductions printed on high-quality coated paper.