When Mitch returns to Danville to enact his revenge, Ultimate convinces Phineas and Ferb to build him his Own "Beak suit" to save the city all the wille keeping it a secret from Fossy (In order to protect her). Meanwhille Khaka Peu Peu teams up with Mitch when he hears The Beak has returned. And Candace dons her Dangiraffe costume to once again "Bust her brothers."