The bombing of a freighter disrupts the tranquility of Kiel Week. Two Polish sailors are killed. In the Baltic Sea city, it seems that criminal organizations are trying to reallocate their territories. The SOKO Kiel Week begins its investigations. Chief Inspector Frank Reuter is assigned to work with Chief Inspector Jens Vogt, but from the start, there is distrust between the two. When Reuter suspects a mole within their ranks, their collaboration is put to a severe test.