It is summer 1989 and fifteen-year-old Clotilde is on holiday with her parents in Corsica. On a twisty mountain road, their car comes off at a curve and plunges into a ravine. Only Clotilde survives.

Twenty-seven years later, she returns to Corsica with her husband and their sulky teenage daughter. Clotilde wants the trip to do two things - to help exorcise her past, and to build a bridge between her and her daughter. But in the very place where she spent that summer all those years ago, she receives a letter. From her mother. As if she were still alive.

As fragments of memory come back, Clotilde begins to question the past. And yet it all seems impossible - she saw the corpses of her mother, her father, her brother. She has lived with their ghosts. But then who sent this letter - and why?