Easy!

Bruno Beltrame is a washout as a writer. All that's left of his old talent is to ghost-write "other people's books", currently a biography of a porno star. His passion for teaching has given way to an apathetic routine of tutoring equally apathetic students, including 15-year old Luca, who is ignorant, vivacious and irreverent. One day the boy's mother turns up and reveals a secret that: Luca is his son... And that is not all: the woman is about to leave for a six-month stint as a volunteer in Africa. She asks Bruno to take the boy in, and willfully forgets to reveal the boy's identity.