A middle-aged man walks around Manhattan and thinks different thoughts. Suddenly he sees the shadow of a huge zeppelin moored to a mast on the Empire State Building. A man rises to the hundredth floor - he will fly on a zeppelin to Germany. He is an aeronautics specialist, his name is Adolf Hitler. While passing the time before departure, he meets in a restaurant with his son, a professor of history and sociology, and he tells him about the hypothesis of “turning points”, that there are some events that, if they had happened differently, the whole story would have turned out differently by...