Major Pronin, who has become a general, is investigating the most mysterious crime of Soviet times. The American agents were at their wit's end. Their arsenal includes murders and cunning traps that they build for the Soviet people. Their target is mathematics professor Kovrigina, whom the spies managed to kidnap. Will they be able to take the professor to the States? It seems that nothing is impossible for the CIA, which works in conjunction with big business. But Pronin and his comrades accept the battle. It is impossible to break the Soviet character! Much in this book will seem relevant to you: Lev Ovalov managed to predict the intensity of the current confrontation between Russia and the United States. Read a puzzling and elegant political detective story from a classic of the genre.