Each day, two kindhearted suburban stepbrothers on summer vacation embark on some grand new project, which annoys their controlling sister, Candace, who tries to bust them. Meanwhile, their pet platypus plots against evil Dr. Doofenshmirtz.
Follow the inventive stepbrothers as they tackle another 104 days of summer. Candace is more determined than ever to finally bust her little brothers while their pet platypus, Perry, continues to lead a double life as the suave Agent P — whose sole mission is to thwart Dr. Doofenshmirtz from taking over the Tristate area.