The Swiss psychologist Verena Kast, the literary scholar Michael Maar and the criminalogist and author Stephan Harbort expand the view of a human phenomenon by looking at the current topic of good and evil. The Scottish writer Robert Louis Stevenson literally dreamed of the world -famous horror story "The strange case of Dr. Jekyll and Mr. Hyde". He hit the nerve of the time with it. Because only written in a few days in October 1885, his story became a bestseller. At first there is only Dr. Henry Jekyll, doctor in the Victorian London, who wants to find out the duplication of humans. With the help of an elixir, he manages to split off the evil side of his being. Under the name Edward Hyde, this doppelganger committed evil.