On her 40th birthday, Marguerite Flora, a thriving representative for a nuclear energy firm, starts receiving letters she wrote to herself as a seven-year-old. These letters offer guidance on what to do if her life hasn’t aligned with her childhood expectations, formed while she lived in poverty with her mother and brother in a small village in southern France. Determined to halt the letters, she returns to her hometown to consult a lawyer. During this journey, she also seeks out her childhood love and her estranged brother, hoping to find inner peace.