You're invited to a sleepover at the most luxurious mansion on Zoo Avenue! Kit's parents, the Fabulous Fox-Rats, are rich and famous movie stars, and Kit is so excited to show her best friends around their amazing home. Ruby the Ladybug-Frog, Camille the Butterfly-Seal, and Eloise the Elephant-Bee can't believe how lucky Kit is. After all, she has her very own swimming pool, hair salon, bowling alley, arcade, movie theater, and much more! In fact, the Fox-Rats are so wealthy, even their maid has a maid! With Priscilla the Eagle-Gorilla as their babysitter for the night, the girls have so much fun until a ridiculous problem suddenly POPS up! Can they all work together to clean up the mess? Can Mr. Graham the Gopher-Ram drive them through the crazy Zoo Avenue traffic in time to save the big movie premier? And can Kit's friends somehow help her realize the real reason that she is the luckiest girl in all of Zoo City?