In 1970, a young tunisian comes for the first time in France, sent by his family to help his elder brother, wrongly accused of murder and imprisoned in Paris. He arrives by boat in Marseille where he meets tunisians who are eerily different from those he knew in Tunisia; he meets french people who seem enigmatic to him, and a rather disturbing atmosphere that makes him doubt little by little what he thought he knew : his brothers innocence, his own innocence, his own mental integrity. It's a cultural and personal identity put in jeopardy, in a post-colonialism background.