You're walking through the streets of London. It's getting dark, and you want to get home quickly. You turn into a narrow side street. Everything is quiet, but as you pass the door of a large, windowless building, you hear a key turning in the lock. A man steps out and looks at you. You've never seen this man before, but you immediately realize he hates you. To your horror, you discover you feel the same aversion to him. Who is this man who seems to hate everyone? And why has he come from the laboratory of the highly respectable Dr. Jekyll?