William and Mary have been married sixty years. William is a celebrated surgeon, Mary a devoted wife. William and Olivia have been together twenty years. Olivia was once a tennis star, but her career has long since faded. Clinical psychologist Joe O'Loughlin knows only one of these stories to be true. But when he is called to his father's bedside after a brutal attack, everything he once knew is turned upside down. Is it possible his father was leading a double life? A mesmerising psychological thriller.