Several retired women have been attacked in their apartments by an unknown man. None of them have been raped or killed yet, but the perpetrator's brutality is increasing with each case. The attacks always occur at the same time, on Thursday afternoons. The violence is followed by robbery, with money and jewelry disappearing. At the intercession of a former colleague, Major Bohuslav, who has been temporarily reassigned to the police archives because he has recently been dealing with his difficult family problems with alcohol, is put in charge of the case. Bohuslav sees this case as his last chance. He successfully solves the complicated web of family and "business" relationships, in which, as it initially appears, the murder was committed by a man who was recently buried, in cooperation with Captain Mazancová.