A Chinese computer scientist is murdered in his student flatshare in Freiburg. There are only a few clues, but the case is politically sensitive: the victim is the son of a vice minister from Beijing. How is Grabowski supposed to investigate when he can't even search the victim's smartphone because most of it is in Chinese? And can he trust the translator? Does the case have personal or even political implications? And what do the clues leading to Portugal mean in relation to a bribery scandal involving purchased visas?.