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.
Spending two weeks at the New Jersey shore as mother's helpers, Mary Anne objects when Stacey neglects her babysitting duties after falling in love with Scott the lifeguard.