Archimedes and Lydia are two normal people among millions. Out of the rush-hour masses in the morning they step out of the chaos of thousands of people who make the underground stations crowded. Both of them are carrying violin-cases. However they haven't met. Not yet. They find their way to the roof of a block of flats. They open their violin-cases. He takes out his rifle with an objective-telescope. So does she. It was a pure coincidence. But they aren't astonished - it's normal. He just starts talking to her hesitantly. She answers hesitantly. Soon they are talking about all sorts of things. They're telling each other about their lifes. They philosophize about good and evil, truth, morals and reprehensibility. It's as if they were sitting in a park on a garden bench feeding pidgeons.