In an unusual case, the Munich chief inspectors Batic and Leitmayr have to cross the boundaries of time and space in several ways. The respected development expert of an NGO that organizes aid projects for Africa from Bavaria is murdered with a long-forgotten poison. Indications of possible perpetrators or a motive are initially rare. However, shortly before his death, the victim announced his own murder. There are traces of a meticulous search in the man's apartment - and a young woman from Kenya was apparently with him in his last minutes. But when the car they were taking to the hospital crashed, she left him alone and disappeared.
Batic and Leitmayr come across clues that lead to a globaloperating smuggler cartel in East Africa, which uses older people of German origin as money and drug couriers: inconspicuous pensioners who have never been criminals to date. One of this group is arrested at the airport in Kenya with a suitcase full of money and is now in Nairobi's toughest prison, where he fears for his life because of his insider knowledge. The other pensioners in Munich are stubbornly silent. They are all just small fish in big business - and the Bavarian investigators have to resort to unorthodox methods to catch the big fish.
Gradually, the clues and clues combine to form an image in the center of which old GDR ghosts from the Ministry for State Security become visible.