At long last, Dawn's mother and Mary Anne's father have decided to get married! 

Stacey's parents are getting a divorce. Stacey is sad and angry, and she has a big decision to make - stay in New York with her father, or move back to Stoneybrook with her mother.

Kristy believes that the autistic child she sits for is normal enough to attend special ed classes at school. After a while though, she realizes that Susan would be better off with children like herself. 

Claudia, who has always been very different from her sister, comes to the conclusion that she must be adopted. 

Mallory and Claudia are helping Stacey unpack from her move back to Stoneybrook when they find an antique trunk in the McGill's attic. Stacey doesn't want the dusty thing, so she gives the trunk to Mallory...who finds an old diary at the bottom of it. The diary belonged to Sophie, a girl who lived in Stacey's house in the 1890s. As Mallory reads deep into Sophie's diary, she discovers a mystery on their hands to solve, because Stacey's house isn't big enough for her, her mom...and a family of ghosts! 

To a New York City girl like Stacey, the fact that an old - supposedly haunted - house in Stoneybrook is being torn down is no big deal. But then her friend Kristy discovers the house was built on a graveyard, and when Stacey sees a horrible face in one of the windows, she wonders if the house really could be haunted!

Claudia has a sad good-bye to make. Her grandmother, Mimi, has just died. Claudia understands that Mimi was sick for a long time, but she's still mad at her grandmother for leaving her. Who will help Claudia with her homework...and share "special tea" with her? 

Claudia's not worried when she hears her newest baby-sitting charge, Betsy, is a great practical joker. After all, how much harm can one girl do? As it turns out - plenty! Claudia breaks her leg because of one of Betsy's mean jokes...and now she's talking about quitting the club. Baby-sitting might be too dangerous. The rest of the BSC decides that Betsy needs to be taught a lesson - and the joke war is on!

Lately, the pressure's really been on Stacey. She hasn't been feeling well, her schoolwork and baby-sitting jobs are almost out of control, and she's sick of being in the middle of her parents' fights. Then it happens: Stacey ends up in the hospital because of her diabetes. The baby-sitters are worried. So is Stacey. Why are things always so hard?

Visiting her father on the west coast, Dawn is tempted to stay with him when she enjoys the beach, Disneyland, and a wealth of healthy restaurants, but the homesick baby-sitter fears leaving her mother and all of her friends.

The members of the Baby-Sitters Club come to the rescue to help Mary Anne search for her beloved kitten, Tigger, who has suddenly vanished.

Stacey's so excited! She's invited her friends in the Baby-Sitters Club to New York City for a long weekend. It's going to be perfect - a party and a sleepover on Friday, a big baby-sitting job on Saturday, and lot of sightseeing on Sunday. But what a mistake! The BSC is way out of place in the big city. Mary Anne sounds like a walking guide book, Dawn is afraid of everything, Kristy can't keep her mouth shut, and Claudia is jealous of Stacey's friends. Can Stacey be in the BSC anymore?

Stoneybrook has gone star-crazy! Derek Masters, an eight-year-old regular on a hit TV sitcom, has moved to town. Everyone's wondering what a real-live TV star will be like - will he drive to school in a limo? Jessi can't believe it, but even stars need baby-sitters, and she's the lucky club member to watch Derek Masters. Even though a lot of kids at school call Derek a spoiled brat, Jessi likes him immediately. He rides bikes and eats junk food like a normal kid, but he has exciting stories about Hollywood, too! Maybe Jessi would like to be a star, too!

Lately, it seems like each of the baby-sitters besides Dawn has been singled out...and she's a little jealous. But now it's Dawn's turn to shine: Mrs. Pike has asked her to help prepare Margo and Claire for the Little Miss Stoneybrook contest! Dawn's going to do everything she can to help her charges win, even if Margo's only talent is peeling a banana with her feet. But then Kristy, Mary Anne, and Claudia are helping Karen, Myriah, and Charlotte enter the contest, too. It's hard to tell whether the competition is fiercer at the pageant - or in the BSC!

Mallory discovers that the terrible twins she baby-sits on a regular basis are not really bad - they just want to be treated as individuals.