Polly takes on the snooty Augustus Uberrich, the ten year boat race champion, in a tiny boat race across Cosmo Park Lake. But when Augustus cheats with his tricked-out boat, Polly must go pocket-sized in her own boat to take down the cheater. The epic boat race takes Polly around the lake and face-to-beak with a duck in need. Saving the duck means sacrificing her win. Polly will choose to help her feathered friend, no matter what the consequences. In the end, Polly learns that winning isn't everything

On their way to do "grown-up things" and prove they're not babies, Polly and pals must take a shortcut through the baby playground.