Mary Anne has never been a leader of the Baby sitters Club. She has left that up to Kristy... or Claudia... or Stacey. But now there is a big fight among the four friends, and Mary Anne does not have them to depend on anymore. It is bad enough when she is left alone at the lunch table at school. But when she has to babysit a sick child without any help from the club members, Mary Anne knows it is time to take charge. The Baby Sitters Club is going to fall apart unless somebody does something, fast. Maybe it is time for Mary Anne to step in and save the day!