A few days before he goes into his actually unimaginable retirement, Klaus Borowski thinks for the first time about what he would like to do in the future - live without crime! He is thinking about travelling far away, which is why he wants to have his passport renewed at the citizens' office. But there Borowski's powers of observation lead him into a monstrous case that also affects him personally and forces him into a race against time. Only four days remain to solve the case. The case will put the whole of Kiel in a state of emergency ...