When Rosie's best friend has an affair with her husband, the consequences reverberate through the lives of the two families. Relationships are torn apart, friendships shattered and childish innocence destroyed. Her daughter Daisy's fragile hold on reality begins to unravel when a letter arrives that opens old wounds. Rosie's son Max blames himself for everything that happened. And her ex-husband Nick has his own version of events. As long-repressed memories bubble to the surface, the past has never seemed more present and the truth more uncertain.