"Klein, a German Case" - The inside story on international terrorism related by an ex-terrorist Hans Joachim Klein. Through interviews, archive footage and reconstitution that clarify certain events, Klein reveals the workings of international terrorism : the underground networks, his participation in the OPEC bombing in Vienna, training camps, the manipulating role played by certain governments and the cynicism of those underground shadows that terrorized the world for 20 years.

Klein, un cas allemand

On December 21, 1975, six terrorists from the Revolutionary Cells, led by Carlos 'The Jackal' forced their way into the conference room of the OPEC headquarters in Vienna and took seventy ministers hostage. A gun battle with the police ensued, and three people were killed. One terrorist was seriously wounded. The terrorists managed to escape to Algiers with a few hostages and the wounded man. There the hostages were released. The wounded terrorist was Hans-Joachim Klein. At the moment that Klein arrived in Algiers, he decided to quit terrorism.