How deeply the relationship between mother and daughter can change is shown in her next psychological novel by master detective Agatha Christie. Ann Prentice falls in love with Richard Cauldfield and hopes for new happiness. However, her only child, nineteen-year-old Sarah, is completely against it and consistently destroys all chances for a possible marriage. Their mutual deep love alternates with an equally intense hatred. Jealousy is the enemy for life, or can one forgive the other?