Angry at what Goldilocks has done to their house, the three bears decide to get back at her by messing up her house, but they make an unfortunate mistake.
Bertie's sister has chickenpox and Bertie thinks that if he can catch it he will not have to go to school and admit he did not do his homework--and that is just the first problem that Bertie faces in this trio of stories.
Bertie finds trouble everywhere, and in this trio of adventures he has plans for his dog's fleas, locks a substitute teacher in the storeroom, and has an encounter with a fire engine.
Bertie is convinced that the grumpy school janitor is a vampire, but locking Mr. Grouch in a shed is probably not a good idea--and that is only the first trouble that Bertie finds in this trio of stories.