Highest alert level around the Palais Liechtenstein in Vienna at the international conference of the United Nations. But even these strict precautionary measures cannot prevent the assassination attempt on the arrival of Marcus Sherman (Peter Gilbert Cotton), when the American conference leader and his security people drive up in a black limousine. The bomb was hidden in the car of Kásim Bagdadi (Samy Hassan), an Austrian of Iraqi origin, who was supposed to speak to numerous diplomats and heads of state from all over the world as a representative of the Internet community "Comet". While Marcus Sherman escaped unharmed, Kásim Bagdadi and a policeman died in the massive explosion.
The first signs point to a suicide attack with an Islamist background when Moritz Eisner (Harald Krassnitzer) and his assistant Bibi Fellner (Adele Neuhauser) from the Federal Criminal Police Office start the investigation. However, in this case, which attracted a great deal of attention, both of them had to submit to the Federal Office for the Protection of the Constitution and Combating Terrorism (BVT), which was also involved in a joint "task force". The head of this small special unit, Major Melanie Warig (Susanne Wuest), lets the chief inspector feel this quickly and unmistakably, which makes Moritz Eisner angry. From the very first moment, a strong rivalry breaks out, which is intensively fueled by Eisner's boss Ernst Rauter (Hubert Kramar). Because he has a considerable dislike for his colleague Mag.
Fred Michalski (Alfred Dorfer) from the BVT and his lofty ambitions. Was Kásim Baghdadi a terrorist who had prepared this attack as a loner and unnoticed by everyone? Or was he supported by an organization? His mother Nawal Bagdadi (Proschat Madani), who works as a department head at the UN, angrily rejects these suspicions. And Eisner's daughter Claudia (Tanja Raunig), who knew Kásim personally, begs her father: "He was never a terrorist in his life.