The series tells the story of the establishment and operation of a spy ring of the Soviet Union in Belgium and France before and after the occupation by the Nazi regime , its connection into the administration of the Third Reich in Berlin and subsequently to the exposure and obliteration of the ring and their members. "Die rote Kapelle" (The Red Orchestra) is based on the book "Kennwort Direktor" (Password Director) by Heinz Höhnes and set in scene in a semi documentary style.—anonymus