In Provence, under a sweltering sun, Sylvie returns to the crumbling family home of La Reverie with her youngest daughter Emma.

Yet every corner of the house is haunted by the memories of Elodie, her first child - memories she has tried to forget, but whose long-ago death the villagers certainly haven't.

As temperatures rise, and forest fires rage through the French countryside, memories of Elodie spread further through Sylvie's mind...

Because there's something Sylvie's been hiding about what happened to Elodie all those summers ago.