Synopsis

As autumn approaches, Phineas and Ferb conceive of "S'Fall," a vibrant realm brimming with colossal leaf piles and pumpkins. Simultaneously, at Evil Inc., Dr. Doofenshmirtz is guiding Rodrigo, an earnest pupil in the arts of wickedness. Alas, Rodrigo’s malevolence is genuine, and when he imprisons Dr. Doofenshmirtz and Agent P, the responsibility of rescue falls to Major Monogram's son, Monty.