Binks, Kathleen's dog, has escaped from his aunt and is on his way to St. Clare. He arrives there at the same time as Miss Lewis, who has been ill for a long time and is now returning to school. She makes it clear to the girls that the school rule forbidding pupils to keep pets cannot be broken. A long discussion ensues about what is more important, the rule or the people? The debate extends from the history lesson through the afternoon, evening, night and into the next morning. Then Miss Lewis ends the discussion and tells Kathleen that she is not allowed to keep the dog at school. But teachers are not forbidden. And so she will take Binks with her. A solution that everyone is very happy with.