For the young Méte, a graphologist fascinated by the psychology hidden behind writing, it's an embarrassing and difficult situation having to take care of his half-sister Belinda, a seventeen-year-old teenager in the balance between everything and nothing, during the second marriage of Méte's father (the only thing the two have in common). To avoid the situation, Méte pretends to be mostly busy with Damiano, a womanizer friend, and Bruno, colleague and separated father. But Méte must eventually face his future half-sister, a subject hitherto only grazed.