Francesc is a solitary thirteen-year-old boy who finds by chance the book The myth of Sisyphus by Albert Camus in school. Fascinated by the philosopher's ideas, he decides to become an existentialist, raises his coat collar and starts calling himself Jean-François.
He sets his mind on going to Paris to meet Camus. Lluna, a teenage girl older than him who lives in the present, agrees to go with him on one condition: they must make a stop on the way to see the French boy she had an adventure with last summer.
Jean-François and Lluna take off to discover the sense of life, with or without Camus.