Claudia's not worried when she hears her newest baby-sitting charge, Betsy Sobak, is a great practical joker. After all, how much harm can one little girl do?
Plenty. Claudia breaks her leg as a result of one of Betys's mean jokes . . . and now she's talking about quitting the club. Kristy thinks Betsy needs to be taught a lesson. She also thinks the Baby-Sitters are just the ones to do it.
Watch out, Betsy Sobak! The joke war is on!
