When investigative journalist Maria Awes gets on a call from serial killer Todd Kohlhepp, he claims he has murdered more than his seven known victims. Awes teams up with former FBI profiler John Douglas, and Kohlhepp's former colleague and now biographer, Gary Garrett, to unravel the truth. Digging into Kohlhepp's troubled youth, Awes secures an exclusive interview with his first known rape victim in Tempe, Arizona and raises questions about another Arizona rape case that has never been solved. Meanwhile, doubts emerge whether Kohlhepp is really the Superbike Killer - a murderer who escaped detection in what became Upstate South Carolina's biggest cold case. Although he confessed to the crime, can his story be trusted, or is he taking credit for crimes he didn't commit just to be remembered as a more prolific serial killer?