In 1958, in a small Devon village, on an idyllic summer afternoon, two children are drowned. Their parents, Isabel and Robert, are overcome with grief but, as time passes, their tragedy becomes part of the everyday fabric of village life. One summer's day, thirty years later, Anna arrives. She comes to the village on a whim, hoping to start afresh - and, without telling anyone she is pregnant, goes to live with Isabel. For a time the women find solace in each other's company, but the baby's arrival causes powerful feelings of loss and heartbreak to surface, and Anna must question whether Isabel's feelings towards her child are entirely benign . . .