every day of their summer vacation candace’s brother phineas flynn and their stepbrother ferb fletcher build a new machine or invention. candace knows that she would get in serious trouble with her parents if she did anything like create phineas and ferb’s inventions which she believes are dangerous so every day she tries to show her mother linda what phineas and ferb created so that she’ll get angry and punish them (or as candace puts it “bust them”.) but by the time candace shows her mother phineas and ferb’s latest invention it has mysteriously disappeared (normally because of perry the platypus’s battles against dr. doofenshmirtz) making candace look like she’s insane.