Iris P., alias "Iris Schneider," was an undercover investigator who maintained close friendships and had intimate relationships with people she spied on.
For years, she investigated the left-wing scene and the "Rote Flora" in Hamburg until her exposure in the media in 2014. A few months later, two other undercover detectives in Hamburg were uncovered: Maria B. (cover name "Maria Block") and Astrid O. (alias Astrid Schütt).
What are the consequences of surveillance for the individual and for society as a whole? How free are people who are under surveillance?