The best detectives in Europe, including the famous Drongo, are looking for the “Stafford Butcher” - an elusive maniac. The killer informs in advance where and when he will tear his next victim to pieces, and each time, having performed his ritual, he masterfully disappears. Drongo is already on the trail of the maniac, he is chasing him through the narrow streets of Florence, and it seems that he is about to overtake the criminal. But the “butcher,” as if mocking the detective, crucified the young woman and once again disappeared without a trace. The next city of blood sacrifice is Venice. Drongo goes there...