Three casinos. Three bodies. Three days. After a string of brutal murders in Las Vegas; Cassie Hobbes and the Naturals are called in to investigate. But even with the team's unique profiling talents; these murders seem baffling: unlike many serial killers; this one uses different methods every time. All of the victims were killed in public; yet the killer does not show up on any security feed. And each victim has a string of numbers tattooed on their wrist. Hidden in the numbers is a code -- and the closer the Naturals come to unraveling the mystery; the more perilous the case becomes. Meanwhile; Cassie is dealing with an equally dangerous and much more painful mystery. For the first time in years; there's been a break in her mother's case. As personal issues and tensions between the team mount; Cassie and the Naturals will be faced with impossible odds -- and impossible choices. With lives and love on the line; the stakes couldn’t be higher in this fast-paced; thrilling novel from the #1 bestselling author of The Inheritance Games; perfect for fans of A Good Girl’s Guide to Murder and One of Us Is Lying.