Two British masters of suspense weave a gripping tale of enduring friendship, buried secrets, and deadly revenge in this psychological thriller. Best friends since childhood, Wendy and Nell know each other better than anyone—or so they think. When someone threatens to reveal a secret that would destroy their bond, it alters the course of both their lives. Nell leaves for France while Wendy embarks on marriage and motherhood. They keep in touch with letters . . . yet hide the lonely and violent truth of their lives.Then a twisted, deceitful face from the past turns up to wreak havoc on both of them. Someone is seeking revenge. And that someone is a killer. It’s time for Wendy and Nell to face their demons—no matter the cost.