May Moore, 29, an average Midwestern woman and deputy sheriff, has always lived in the shadow of her older, brilliant FBI agent sister. Yet the sisters are united by the cold case of their missing younger sister--and when an eerily similar serial killer strikes in May's quiet, Minnesota lakeside town, it is May's turn to prove herself, to try to outshine her sister and the FBI, and, in this action-packed thriller, to outwit and hunt down a diabolical killer before he strikes again.

May Moore wastes no time investigating, but things quickly go south when her older sister, an accomplished FBI BAU agent who constantly outshines her, is called in by local authorities to help. Making matters worse, the case brings up dark memories and buried secrets from her family's history--and neither May nor her sister are ready to confront the past.

But with a ticking clock, May and her sister will have to put aside old grievances to find this killer and save the next victim, and they will have to be careful not to assume this is the same killer from their past.

But is he?