Paris today - hard, severe, without pardon. Nicolas is 20 years old and is a young dilettante with a capacity for the most diverse fields: mathematics, physics, history of art, and music.

     He grew up behind the walls of a great property belonging to his parents, protected from everything and everyone, without any knowledge of the world. However, age advanced, at least in appearance, and with age, a desire to stretch his wings. No sooner had he become 19 years old, and he left home, denying his roots and traditions, and took to the streets.

     Work as a window washer and dish washer provided him with enough only to survive. His friends are people who live on the streets with him. Life is hard enough, yet it has a certain charm. One day, with his friends, he sets out on a risky adventure.

     He and Pierre wind up in prison. When he is released, his mother offers him a consolation prize: a new car. The boy rejects the gift and returns to his former neighborhood. Things, however, are no longer the same. He has no other choice but to return home: his father has disappeared leaving no trace, and he is the eldest son.