Vowing to get back on the right track, a petty delinquent gets a real job, but quickly discovers that his new employers are not very scrupulous.

One morning in Paris, rue de la Sante, Pierre, thirty-five years old, gets out of prison after five years of refusing any contact with his past. After a day of sleep in one of the rooms of his old friend's hotel, he is going to live his first night of freedom in solitary wanderings in the streets of Paris. He then decides to read the letters of his friend Sylvana. They will reveal past events that will influence his itinerary, his encounters, his moods.