...Europe, 1939. History has taken a different path, but war is still close. There are provocations on the Soviet-Polish border, in France and Germany, arrests are underway, planes set on fire by saboteurs are burning at the airfield near Belarusian Logoisk... The commissar did not leave, did not leave... Deputy political instructor Alexander Belov, a former student of IFLI, a researcher of German folklore and an underground worker, was waiting for arrest, but was captured. From lordly Poland to the Nazi Reich. There is no turning back, and Father Muller himself wonders if he is a spy named Nestor?... The alien girl with the short name Sol is fourteen years old. Everyone is killed or captured, she is the last. There is no shelter on Earth, and she flies up into the black sky. The father’s order must be carried out at any cost, because Sol is not just a seventh grade student, she is a knightly lady. A knight without a sword is in every way similar to a knight with a sword - even if he is without a sword... In the sky, on the ground and underground... Paris and Berlin, a mysterious mountain hotel, an abandoned metro station, the barracks of Buchenwald and the Silver Road that stretches over all the worlds. It's easy to take risks when you hear the drums...