Just one week before summer vacation starts, Ernie finds out that Mrs. Arlon is moving up to sixth grade and will be his English teacher, AGAIN. And not only that, she has given everyone a summer assignment! Macy Grace, who always makes straight A's, is the only one who appears happy about the assignment. Ernie really doesn't like Macy Grace at all. But things get worse. Ernie has to go to his Aunt Mabel's house for two whole weeks while his parents go on a cruise WITHOUT him. And he's not going to be the only one staying with Aunt Mabel. Guess who else is going? Macy Grace! Join Ernie and Macy Grace at Aunt Mabel's for two weeks of.....fun? And if you are wondering about the summer assignment, read part 2 to find out what mysteriously happens to Ernie's journal.