The heroes of the book are fighters of the "invisible front" and their assistants, materials about which were only recently declassified by foreign intelligence. Alexey Botyan, the prototype of the famous Major Whirlwind, a true savior of Krakow, during the Great Patriotic War commanded a unit of the special forces "Olympus," operating behind enemy lines. Then for about forty years he worked in Soviet foreign intelligence. Walter Stennes was once a friend of Hitler, Goebbels, Goering.