Kristys mum is getting married, and Kristy is going to be a bridesmaid! The only problem? Fourteen kids are coming to town for the wedding. Kristy, Claudia, Mary Anne, Stacey, Dawn, and Mallory think they can handle it, but that is before they spend a week changing nappies, stopping arguments, solving mixups, and planning activities. It is the biggest job the Baby Sitters Club has ever had, but they will work together to make sure Kristys big day is a success!