When Martha's beloved father dies, he leaves her two things: a mysterious stash of letters to an English woman called 'Catkins' and directions to a beach hut in the English seaside town of Wells-Next-The-Sea. Martha is at a painful crossroads in her own life, and seizes this chance for a trip to England - to discover more about her family's past, and the identity of her father's secret correspondent. Sylvia's husband Howard has gone off to war, and she is struggling to raise her two children alone. Her only solace is her beach hut in Wells, and her friendship with Connie, a woman she meets on the beach. The two women form a bond that will last a lifetime, and Sylvia tells Connie something that no-one else knows: about a secret lover... and a child.