In a fantasy world Prince Phineas is due to marry the beautiful maid Isabella. However intervention from the evil sorcerer Doofenshmirtz causes Isabella and her platypus friend Perry to be transported to the real world. Isabella and Perry befriend a teenage boy named Jeremy. Meanwhile Phineas and his servant Ferb try to rescue Isabella, and bump into a girl named Candace. Doofenshmirtz and his golem henchman Norm follow our heroes to kill Isabella.