Kristy's mom is getting married, and everyone is coming to town to help, bringing their kids with them. Fourteen kids! Kristy is sure she and Stacey, Claudia, Mary Anne, and Dawn can handle it--they're professional baby-sitters, after all, and Kristy's mom has offered them a lot of money to take on such a big job. But will a week of changing diapers, stopping fights, solving mix-ups, and keeping fourteen children entertained prove to be too much for the BSC? Can they keep things under control for Kristy's big day?