The animals of the forest have always been terrorized by the legend of the Blue Hour and its demon, a story as old and decrepit as the old rabbit telling it. Enough already! Why should he be mean in the first place? Oops. Once again, Ulys, a little mouse and apprentice storyteller, can’t hold his tongue. This is too much for Ulys’s big, furry ears, and he decides to summon all his courage and set off to meet the creature that haunts the Blue Hour.