Susan Berman grew up in Las Vegas luxury as the daughter of Davie Berman, casino mogul and notorious mafia leader. After her father died she learned about his mob connections. Susan then dedicated her life to learning about Vegas and its underworld chiefs. Her life took a bizarre turn in l982 when Kathie Durst - the wife of her good friend, Robert Durst - mysteriously disappeared. Kathie's husband was a prime suspect but the case was never solved. After the Kathie Durst case was reopened, the DA was about to question Susan Berman about what she knew regarding a phone call Kathie supposedly made to her medical school dean saying she was sick and wouldn't be at school. The call was placed the day after Kathie had vanished. Soon after the Kathie Durst case was reopened, Susan Berman was found dead, shot in the back of head. No forced entry, no robbery, nothing missing from her home.

The book covers what led to Durst's capture. Police records placed him in California at the time of his good friend Susan Berman's murder. HBO filmmakers discovered a letter unknown before, written by Durst to Susan. It was a dead-on match to the cadaver letter police say the killer sent before Susan's body was discovered.