On an autumn day in 1909 wealthy young Richard Finborough catches sight of twenty-year-old Isabel Zeale at the harbour at Lynmouth in Devon. Her beauty captivates him. Aware of shameful secrets in her past, Isabel has no intention of letting anyone into her life, but Richard's persistence and ardour eventually win him her trust - and her hand in marriage. The decades pass and Isabel and Richard raise a family through the turbulent times of the First World War and the 1920s. As her children reach adulthood, Isabel is convinced her secret is safe - until an old acquaintance emerges from the shadows, turning her world upside down. To protect the happiness of those she loves most, Isabel must find the courage to confront what came before, and live with the consequences...