After another one of Phineas and Ferb's inventions, Candace convinces Phineas that he'd be better off as a normal kid. A mysterious man give Phineas a chance to start his life over with an invention that will rewrite history so Phineas was born without his powers. The machine works, but creates a different time where children are hunted. Without his powers Phineas must find his friends to correct history, all the while discovering his own history. In this time Phineas and Ferb had never become brothers, Isabella and the Fireside Girls form a resistance, Perry has become a fat and lazy street platypus, and Candace is an enslaved worker at Mr. Slushy-Burger.