After 44 years, film director Boris Lehman returns to Lausanne, the city where he was born on the 3rd of March 1944, at the end of the war. He only lived in Lausanne for a year. His parents were Jews who had sought refuge in Belgium when the Nazis seized power in Poland. Forced to flee from Belgium during the German occupation, they reached neutral Switzerland after a clandestine journey through France. Boris Lehman has no memory of the episode at all. His parents are dead, all witnesses have disappeared. Armed only with a few documents and photographs found in a cardboard box, he wanders through Lausanne, searching here and there for some signs that would indicate his presence, his early life, gathering as it were the evidence of his very existence. But the city remains silent and distant. Meetings will usher in stories, irresistibly leading Boris to deal directly or indirectly with the subject of his birth, indissolubly linked with the lake whose French name ‘Léman’ so resembles his own.