Ever since the death of their father twenty years before beautiful thirty-two-year-old Anna has acted as her younger sister Becky's support playing the peacemaker in her stormy relationship with their mother and counselling her through the traumas of a life that has always appeared charmless and problematic in comparison to her own. Now married to wealthy handsome David Lawrence with a luxurious country home and a successful career in broadcasting Anna's good fortune looks set to continue. But when she unexpectedly falls pregnant and Becky's marriage runs into trouble the door to the sisters past suddenly swings open exploding all their long-held perceptions both of each other and themselves.