Nibbles is taking all the birthday treats in town, ruining everyone's birthdays. The Powerbirds set out to stop Nibbles and make him return the treats.

Ace and Polly have to save the day and their reputations when Minerva poses as a fake Powerbird to make them look bad.

Minerva takes away everyone’s ability to talk, while Polly learns that words aren’t the only way to communicate.

All the villains team up to stop the Powerbirds once and for all.

Scrapper launches mounds of waste into town in an effort to turn it into his own Wasteville paradise, forcing the Powerbirds to clean up his mess.