Best friends Rosie and Lisa's families had always been inseparable. But that summer, Lisa had an affair with Rosie's husband, Nick. None of them would forget that week on the wild Norfolk seacoast. Relationships were torn apart, friendships shattered and childish innocence destroyed. Now, after years of silence, a letter arrives that begs for help --- a letter that exposes dark secrets. Then Rosie’s daughter Daisy's fragile hold on reality begins to unravel. Teenage son Max blames himself for everything that happened that long hot summer, and Nick must confront his own version of events. As long-repressed memories bubble to the surface, the past has never seemed more present and the truth murkier.