Charles Manson's name is synonymous with evil itself. Almost forty years after the Tate-LaBianca murders, history's most infamous criminal still inspires fascination and fear. But Manson himself never killed anyone. Instead, he convinced young, middle-class men and women to commit unthinkable acts of violence. Forensic psychiatrist Dr. Michael Stone speaks with two of Manson's followers to gain insight into his power: Catherine Share, known in the family as "gypsy," and Barbara Hoyt, a follower who nearly became Manson's next victim. Vincent Bugliosi, the man who put Manson and his most devoted followers behind bars, retraces his investigation into Manson and his motives. With his scale of evil, Dr. Stone investigates what gave Manson his incredible powers of manipulation . . . and why his name still generates such fear.