It's four years after the original "Phineas and Ferb" summer. It seems as though the summer's going on as usual. But then, Doofenshmirtz's plans take an unexpected turn of events... Everything is about to change. And it's going to be bad.

A tragic accident caused now fifteen-year-old Phineas Flynn's biological father to decease. The teenager does not want to give up on his father and decides to seek a way to reverse time and save his father. What he doesn't know, is that in order to save his father, he has to pay a cruel price...

It's a race against the clock for Ferb and Perry to save Phineas. Together with the Resistance and their friends, they have to foil Doofenshmirtz's plans and save both dimensions, before it's too late. Characters & "Phineas and Ferb: Across the 2nd Dimension" (c) Dan Povenmire and Jeff Marsh. "If things went Differently" fanfiction .net version) (c) Girlofchaos99999