Jo is thrilled when her parents agree to let her host the Sleepover Squad to celebrate her spelling bee win, but when her friends start acting strangely, Jo feels like they are intentionally keeping secrets from her.
Olivia is uncomfortable during her first sleepover because her friend Ching Ching lives with both parents and three brothers in a large home, where the rules are very different from those in the apartment Olivia and her mother share.
When Kara decides to host the next sleepover, her brothers promise to ruin the party unless she agrees to be their slave, but when Kara's friends discover what is going on, they decide to help Kara get even with her brothers.
As a reward for winning the school spelling bee, Jo is allowed to host a sleepover at her house, but while planning the party, she cannot figure out why her friends are suddenly acting strangely and keeping secrets from her.
Kate goes to stay with her cousin Sophie but begins to get worried when it is time for bed, not wanting to admit to her fearless cousin that she is afraid of the dark.
Rumblewick, the cat responsible for turning Haggy Aggy into the best possible witch, records in his diary his frustrations with Haggy who shows no interest at all in being mean and casting spells.
Emily says "Yuck" whenever apples are mentioned, but when she and her older brother, Harry, sleep over at their grandparents' house, they all pick apples and make them into delicious pies.
