In the latest in this USA Today bestselling series, Nevada sheriff Porter Beck receives an anonymous riddle leading him to a body hidden for decades, leading Beck and his team in a chase to unravel riddles that will help them uncover and stop a long-time serial killer.
Porter Beck is the sheriff of Lincoln County, Nevada, which is mostly desert and mountains, large in area and low in population, largely known to the outside world for containing Area 51. It is there, in the Black Mailbox near Area 51, that a communique for Beck himself is found. It's a riddle that, once deciphered, leads Beck and his team, as well as Las Vegas PD, to Lake Mead where, in its ever-shallowing waters is found an old oil drum chained to the bottom of the lake. Inside are human remains, which prove to be Beck's maternal grandfather, missing since the 1970s.