Madagascar, at the turn of the 1960s and 1970s. On an air base of the French army, the soldiers live the last carefree years of colonialism. Influenced by his readings of Fantômette, Thomas, a child who is not yet 10 years old, gradually forges a look at the world around him.
A novelist attends the trial of a woman accused of killing her 15-month-old daughter by abandoning her to the rising tide on a beach in northern France. But as the trial continues, her own family history, doubts, and fears about motherhood are steadily dislodged as the life story of the accused is gradually revealed.