Sybil Van Antwerp is a sharp-witted, fiercely opinionated, retired lawyer who has long used letters to impose order on a complicated world — writing to friends, family, literary icons, and one elusive recipient whose message she has never sent. But when an unexpected letter from her past resurfaces, Sybil is forced to confront a long-buried chapter of grief, regret, and unresolved guilt.
Federal agent Alexandra Barnes believes that Catherine Petersen is a serial killer who marries rich men and then murders them for their money. But since Catherine is seemingly a master of disguise and has multiple identities, Alexandra can't prove anything with conventional detective work. With no other option, she goes undercover, pursuing the same man as Catherine, and hoping that Catherine will slip up and reveal her true identity.
