Lawyer Francis Pettigrew is called to serve in the clerical office. But you won’t have to die of boredom! In their spare time, employees amuse themselves by coming up with the plot of the ideal crime. Meanwhile, real life throws up more complex mysteries: first espionage, then real murder, for which, it would seem, there are no motives. The police are at a dead end - they have to start their own investigation. And then matters of the heart haunt Pettigrew... And again Pettigrew is investigating a murder. This time there were plenty of reasons for him: many residents of the quiet village had a grudge against the unfortunate victim. And this meek lamb is not so simple, after whose death so many secrets are revealed. There is plenty of evidence: a strange letter, a diamond earring, the murder weapon found by the boys. But who committed this crime under the yew trees, if it seems that all the suspects have an alibi?