From the author of After the Crash comes a gripping new thriller about one woman's descent into grief and madness after her ten-year-old son disappears without a trace. Maddi Lib ri is a successful doctor living an idyllic life in the South of France. On the morning of her son's tenth birthday, they walk to the beach together. The boy presses for a quick swim, but when the surf is too rough, she sends him off to buy a baguette...