1759, Mauritius Island, Indian Ocean. The island is controlled by French settlers and the deported slave population live in fear while toiling in the sugar cane plantations. Unlike her disillusioned father Massamba, 16-year-old Mati refuses to keep her head down and accept her fate.

During a book signing in Normandy, Annie Ernaux, 70, revisits her memories of the summer of 1958, when she was 17. That summer, she left her hometown to work as a camp counsellor. At the first party, the head counsellor set out to deflower her. Finding him handsome, she lets him do it, as if against her will... Her body becomes a foreign place for her, an offering to be sacrificed.