Synopsis

The world is shrouded in the Stone Age, and Phineas and Ferb, resourceful cave dwellers, embark on an ambitious project: the invention of the wheel – something novel, enjoyable, and undeniably practical. Elsewhere, Dr. Doofenshmirtz strives to elevate his subterranean laboratory. He intends to achieve a more refined aesthetic by employing a rudimentary implement, a simple stick, as a precursor to his Inator device.