Chicago, USA, October 1929: A man in his twenties lies dead on the cobblestones of a dirty dead-end alley. His tailcoat shows bullet holes at the front and back, and his white shirt is blood-soaked. It seems that his right hand tried to loosen the bow tie at his throat while his life was already ebbing away. The green neon sign of a nearby bar flickers, making the dead-end appear even drearier…