When her mother's remarriage takes her family into a much wealthier neighborhood, thirteen-year-old Kristy finds herself surrounded by snobbish girls who compare clothes, make fun of the Baby-sitters Club, and insult her aging dog.

When her parents leave her with a babysitter, Madeleine sneaks outside to play with Carl, their Rottweiler, on a snowy afternoon.

When her mother cannot find a babysitter for the weekend, thirteen-year-old Monica is left in charge of the house and her stepsister Angela, with disastrous results.