Using documentary material and the testimony of convicted agents, the film attempts to prove that the West Berlin "Kampfgruppe gegen Unmenschlichkeit" was an espionage and sabotage organization. As a militant and anti-communist organization, the KgU supported the resistance against the SED government in the GDR from its founding in 1948 until its dissolution in 1959 and, among other things, founded a tracing service for Western citizens deported to the Soviet occupation zone.