Father Brown starts solving crimes, much to the annoyance of his housekeeper, the police and especially his bishop, who is not amused by a priest playing detective.
April 1945. Because he stole two bars of chocolate, the soldier Rudi is sentenced to death by the court-martial judge Dr. Schramm. Rudi manages to escape from the firing squad at the last minute, and since the end of the war has been making a meager living as a street peddler. Years later, Dr. Schramm is now a respected public prosecutor. By chance, he runs into Rudi one day on the street. Afraid that Rudi will blow the whistle on him, Dr. Schramm wants to scare him out of town. He has Rudi arrested and bullied by the police.
Father Brown is only too happy to interfere with the work of the police in solving tricky criminal cases, usually with resounding success. That's why the clergyman is transferred to a sleepy island called Abbott's Rock. At first, nothing happens there, but somehow Father Brown seems to be attracted to crime: Soon a gang of thieves is up to no good on the island. So Brown makes the headlines again, and is punitively transferred once more. This time he finds himself in a quiet Irish millionaire community.
