Phineas and Ferb are celebrating the fifth anniversary of when they got their pet platypus, Perry. In commemoration, they create a giant shuttlecock and robotic replica figure of Perry to play an improvised game of badminton. However, when Perry’s hovercraft accidentally collides with their shuttlecock, the boys crash into Dr. Heinz Doofenshmirtz’s laboratory and destroy his “Other-Dimension-Inator”, which is designed to help him travel to parallel dimensions.