Vladimir Lota, Candidate of Historical Sciences, Associate Professor, in his book for the first time talks about why in May 1945 the act of unconditional surrender of Nazi Germany was signed twice. The GRU officers saved the day. They obtained secret information that helped reveal the actual plan for Operation Gray, developed by the German command. The heroes of the book are GRU employees Maurice, Voice, Oleg, Phoenix, Bera and others. Being far beyond the borders of the Soviet Union, they found themselves in difficult situations, repeatedly risked their lives, but helped to complete the defeat of fascist Germany. Not all of them were lucky. How scouts worked behind enemy lines is thrillingly narrated by this book.