BKA bodyguard Jan Schäfer is given the job of looking after Fiona Weibel, an important witness due to give evidence at the International Tribunal of the Law of the Sea in Hamburg. The young woman’s employer is a Swiss shipping company accused of transporting chemicals declared as fertilizer to Libya, where they are used to make poison gas. Weibel’s insider knowledge is a threat to the company. For Schäfer and his colleagues, a game of cat and mouse begins, as the life of his shadowy client is in danger.