Peter Hatcher and his family are going on vacation in Maine. Only problem: Peter's nemesis Sheila Tubman will also be there along with her family! And as if that wasn't bad enough, Peter's 5 year-old brother Fudge wreaks havoc with a little girl who lives next door to them at their vacation house. Based on the popular book of the same name by Judy Blume, it recaps all the exciting moments, from when Dad falls off the boat, Peter meets his baseball idol, and even the climatic moment when Peter's grandmother and Sheila's grandfather get married!