Anna and her friends love having sleepovers. So, when Isabel invites Anna and Sadie to spend the night at her house for the first time Anna can't wait Between pranking Isabel's older sisters, make-your-own pizzas, and truth or dare this is going to be the best night ever.

But when one of Isabel's older sisters' dares results in Anna breaking a really special vase, everything stops being all fun and games. Isabel's sisters convince the girls they can hide it from their parents, but after her friends fall asleep, Anna lies on the floor in her sleeping bag, wide awake.

At night, with the lights out and everyone else sleeping, Isabel's house seems different. Unfamiliar. Not like home. Anna misses Banana terribly, and worst of all she feels really guilty keeping what happened a secret. If Anna doesn't stay at the sleepover, everyone might get mad at her for ruining it, but if she stays and lets the secret slip about the broken vase, everyone might get mad at her for that instead. Anna and her friends share all their secrets, but can they help her with her secret dilemma?