1941: For the townspeople of Poole on the Dorset coast, the war feels like it's right on their doorstep. And with more and more men leaving to fight, one fisherman's daughter is determined to do whatever she can to help. Peggy volunteers to use her skills on the water to work with the flying boats alongside the RAF based in the harbour. But when she is asked to undertake a special mission, she will have to make a terrible choice - between her duty to her country and her only chance of happiness. 1998: Rebekah has travelled halfway around the world to take up a role on Brownsea Island. This tiny island off the coast of England is a treasure trove of natural wonder, but it still carries the scars of fighting. And when Rebekah discovers a lost letter from the war, hidden all this time, she becomes determined to deliver it, fifty years later. But the idyllic Dorset harbour hides many more secrets, and Rebekah's search for the truth will change her life in ways she never imagined possible. . .