Following his return from his ill-fated trip to Australia, Francis and Siana Matheson have settled into a loving marital relationship. Siana's main concern is that so far she has been unable to bear her husband another child. Francis however is content to be a father to his grown-up daughters and Siana's young sister Daisy. He also delights in his young son, Bryn, born while he was overseas. However, Francis is unaware that the boy is his illegitimate grandson, the result of the vicious and horrifying rape of his eldest daughter. Although it worries Siana, the need to protect all concerned has left her with no choice. She must keep quiet and live with the guilt of her deceit. But Siana cannot keep the truth hidden forever - and when her tragic secret is finally revealed, there will be devastating and far-reaching consequences.