In 1975, Dr. John Kappler, a Los Angeles anesthesiologist, secretly attempted to kill a pregnant patient by giving her the wrong anesthetic. His fellow doctors not only bailed him out of jail, but also allowed him to continue practicing medicine. At his trial, Kappler pleaded insanity, claiming he had heard voices telling him to kill. This is the chilling portrait of a healer who also became a murderer, and the medical establishment that looked the other way as Kappler became more and more dangerous.