For Momo, summer break promises to be endless in the sad Bleuets projects. But from the day he gets his library card, the course of his summer changes: he devours all the books, to the point of forgetting to eat. And that’s how he meets Mr. Edouard, an extravagant retired teacher. From their conversations, a strong friendship is born. But Momo learns that the old man has Alzheimer’s disease and that his days are numbered. Momo will support his friend until the end and makes him a promise: someday he, Momo, will be a writer!