Polly's babysitter, Ms. Mense, won't let her outside until her homework is done. So, Polly sneaks out of the house to help Lila with her new dog walking business. Now, she must get back in her room without getting caught before her parents get home!

Polly finally gets to babysit Pax, but the job is a lot harder than she thought! Since the only way to make him happy is his to find his missing teddy bear, Polly must bring Pax and her friends on a wild Adventure in Babysitting to retrieve it.