America's favorite series returns with a new look and a Netflix series. Claudia's sister Janine is too busy being smart to be nice to anyone, not even her grandmother, Mimi. But Claudia doesn't have to see Janine much this summer, as the Babysitters Club is starting a new playgroup. It's going to be so much fun. But then Mimi has a stroke and the whole summer changes. Now Claudia is “taking care of Mimi” and Janine isn't helping at all. How can the Kishi sisters get along if Janine is always so mean?