Professor Diggler is doing something sinister and diabolical with Brian's classmates, his teachers (women), and even ... with his mom !!!
This is an official description, but mine:
The guy on the exam passes the reptile professor and he needs blood to get ready from the nose. In this he will help the tutor and, of course, my beloved mother! In the course of the play, the son and mother will learn more about each other's lives, spend time together, and be imbued with mutual sympathy. But the picture is clouded by the mysterious and sinister events that take place in the office of the Gadetic professor. Will our hero understand this?