Grown-ups can be incredibly confusing. They constantly complain about getting older, yet they are always telling you to grow up and act your age. Nine-year-old Iggy knows this struggle all too well. When he asks his parents for a puppy, they immediately shut him down, claiming he just is not mature or responsible enough to handle taking care of a pet. But Iggy is not about to let a little thing like his parents' opinion stop him from getting exactly what he wants. To prove once and for all that he is the definition of responsibility, he comes up with an absolutely brilliant, foolproof plan. Like all of Iggy's greatest ideas, this one requires a lot of careful strategy, a fair amount of top-secret sneaking around, and one very unexpected chinchilla. Naturally, things do not go exactly the way he pictured in his head. Soon enough, his quest to prove his maturity leads to total chaos, a few disastrous mistakes, and a whole lot of screaming. Jump into the fifth and final hilarious adventure in this beloved series to see if Iggy can survive the wild animal kingdom of his own house and maybe, just maybe, finally get that puppy.