His new assignment takes Cenk Batu right into the middle of Islamist circles: Batu is supposed to infiltrate a terrorist cell in Hamburg that – as the BKA and secret services already know – is planning a devastating attack in the Hanseatic city. However, the time and target of the attack are unknown. Batu is tasked with thwarting the planned terrorist attack and locating the group's al-Qaeda contact. Disguised as a radical Muslim, Batu, aka Taylan, learns the intelligent boss of theCell know a German convert, Christian Marschall. This is extremely suspicious, but Batu manages to be accepted into the circle of terrorists. However, he does not only have to contend with the mistrust of the terrorists. The BKA, led by Hans-Peter Oswald, has taken control of the mission. Even Cenk's boss Konau is obviously not privy to all the details and background of the operation...