Mary Anne has never been a leader of the BSC. So when a fight breaks out among the club's four members, Mary Anne feels a little lost, unable to depend on Kristy, Stacey, or Claudia anymore. Sitting by herself in the cafeteria is bad enough; when Mary Anne has to baby-sit a sick child without any help from the club, she knows someone has to take action. It's time for Mary Anne to step in and save the day!

"Originally published in paperback by Scholastic Inc. in 1987."--Title page verso. Includes sneak peek at the next book from The Baby-sitters Club: Dawn and the Impossible Three.