Stoneybrook has gone star-crazy! Derek Masters, an eight-year-old regular on a hit television sitcom, has moved to town. Everyone's wondering what a real-live TV star will be like--will he drive to school in a limo? Jessi can't believe it, but even stars need baby-sitters, and she's the lucky club member to watch Derek Masters. Even though a lot of kids at school call Derek a spoiled brat, Jessi likes him immediately. He rides bikes and eats junk...

Andy Snowden has to take care of his teacher's niece and nephew who are moving to the North Pole. Has he finally met his mischievous match?

While baby-sitting for practical joker Betsy Sobak, Claudia breaks her leg as a result of one of Betsy's pranks and wants to quit the club, prompting Kristy and the other baby-sitters to teach Betsy a lesson.

Brother and Sister Bear are not happy with the idea of Mrs. Grizzle for a baby-sitter, but they find her drawstring bag very intriguing.