Investigative reporters are always on the hunt for exclusive information. But when the secret service serves as a source, can it also exploit journalists as agents? How can journalists become agents? To answer this question, the report accompanies Lars Petersen, head of investigative reporting at Business Insider, an online platform for business news. He explains how the exchange of information works, and when a line may be crossed. The film also looks back at a major journalism scandal in Germany: in 2005, it became public knowledge that the Federal Intelligence Service (BND) had systematically monitored journalists in the 1990s. In some cases over long periods of time; and particularly those who had reported critically on the agency.