A dentist, who is a mouse, decides to be charitable to a fox with a toothache, but wisely prepares for duplicity.
A mouse pitying a fox with an awful toothache, and helping him? This alone should disqualify the story, but that is not the focus of the story. The mouse, Dr. de Soto, sympathizes with the fox's pain, but devises a brilliant trick to protect himself. It is the latter aspect of the story that proves its worth, and leaves the reader wondering if de Soto would do it again.