Kit McMahon lives in the small Irish town of Lough Glass, where everyone knows everyone; children who walk to school together grow up and become sweethearts and marry, people gossip and grumble and dream their lives away. For it is a place where change comes slowly. Until one day, beautiful, mysterious Helen McMahon disappears, presumed drowned in the lake, and then the gossip runs wild. The consequences for Helen's husband, her son, but above all for her daughter, Kit, are unimaginable and will leave not one of their lives unchanged.