When a single-vehicle rollover on Interstate 5 shows a suspicious circumstance, Washington State Patrol, Detectives Trotman and Carver are on the case. A sinister plan reveals itself as the pieces fall together and the suspected murder is linked to more states. But tragedy strikes and the case come to a screeching halt with the death of Special Investigator Max Torkelson, known for thinking outside of the box when it comes to hard-to-solve crimes. Fortunately, a like-minded and up and coming Detective, Sheree Williams, steps to the fore. Her innate ability to decipher the cryptic notes left behind on Max’s files flings the case into overdrive. Unless she presses forward, one of the most frightening mass murder plots in U.S. History will launch within days or even hours.