During a visit to his neighbour, when he hears the jazz standard "Petite Fleur", José - a young father with no job - suddenly kills him. But the next day the neighbour is alive as if nothing ever happened. So José kills him again in a different manner. But the neighbour always reappears. Killing his neighbour becomes part of José’s routine: taking care of the baby, fixing the house, trying to save his couple and... killing his neighbour.