The fatal short circuit

The peaceful atmosphere of the ongoing fair is disturbed by the death of a young woman, who is discovered - much to the displeasure of Petr Beránek - by the artist Ctirad Karafiát. None of the hundreds of visitors to the festival noticed anything, which plays into the hands of a cold-blooded killer. During the investigation, several persons of interest in the woman's death come to light and a trio of well-known criminologists must choose the real culprit. There is no time to waste and unfortunately there is also the possibility that it will not stop at just one murder.