Petunia the Pig and her friend Rose take some "peculiar candy' from their parents' house. After eating the candy, their behavior at school takes a turn for the worse. Their teachers and parents discover the girls have taken prescription medicine that wasn't stored properly. Fortunately, Dr. Shorthorn is able to save the day by examining them and educating the families on the storage and care of medicines. The girls use their experience to help others be drug-free.