For Detective Kendall Stark of Kitsap County in Port Orchard, Washington, memories of her teenage years are overshadowed by a classmate's tragic death, which was ruled an accident. All these years Stark has kept her suspicions to herself, until her high school's upcoming fifteen-year reunion reopens old wounds.

Tori and Lainie O'Neal, the twin sisters who somehow survived the fateful crash, will meet again after years of estrangement, now more bitter than ever in the aftermath of a vicious murder. With the help of forensic pathologist Birdy Waterman, Kendall discovers a chilling pattern of unsolved fatalities. Before another victim is claimed, Stark races to unmask one the most relentless killers she's ever encountered--a killer with the perfect disguise...