Betrayal in the form of treason has existed since the community of people took the form of a state, and espionage goes hand in hand, shoulder to shoulder. Analyzing the acts of traitors, the author came to the conclusion that even deafeningly loud cases of betrayal are not always based on the desire for profit. Therefore, the book explores not so much the event of betrayal itself, but the reasons and motives that contributed to its commission. In addition to the main theme, the book provides piquant details of the life of world-famous personalities: actor Jean Gabin, “chansonnier of the Parisian boulevards” Maurice Chevalier.