The plot of the novel with the participation of Gideon Fell is quite interesting. Three police officials, starting with an inspector and ending with the chief of police, come to the venerable doctor for advice. The crime, despite a lot of rather strange features, seems to have been solved, but circumstances that emerged at the last moment did not allow the case to be brought to court. Each of the three guests tells his part of the investigation, various mysteries find their explanation, new ones immediately emerge, but in the end it seems that everything comes down to the only correct option. However... the already mentioned circumstances destroy everything. Dr. Fell has the final say.