It all begins when Tonio, the son of the king of bears, is kidnapped by hunters in the mountains of Sicily. Taking advantage of the rigor of a winter that threatens his people with famine, the king then decides to invade the plain where the men live. With the help of his army and a magician, he manages to win and finally finds Tonio. But he quickly understands that bears are not made to live in the land of men. The fairy tale written by Dino Buzzati becomes an adventure of rhythm and color thanks to the drawings by Lorenzo Mattotti.