School's out and stepbrothers Phineas and Ferb are determined to make every day an unforgettable adventure. Their over-the-top inventions drive their sister Candace to no end as she tries--and fails--to expose them to their mom. Meanwhile, their pet platypus Perry lives a double life as Agent P, taking on the villainous Dr. Doofenshmirtz and his latest schemes to conquer the Tri-State Area.