Moffie is used to doing everything first, but when her twin, Morgie, gets invited to a sleepover first, she becomes jealous, and also realizes that they have never spent the night apart.
Ben loves to play at his best friend's house, but when it's time for a sleepover all Ben can think about is going home, and Ben's brother and sister try some creative solutions to help their younger sibling get over his fear.
When D.W. finds out she's not part of the sleepover, she decides to have some fun of her own--with the help of some friendly aliens. In the second story Arthur's dog runs away and he tries to understand why.
While sleeping over at his grandparents' house, Christopher hears a very loud, horrible sound during the night and gets up to investigate whether it is an elephant, a monster, or perhaps a dinosaur.