In a quest to save his family, Fin travels back in time via a Sharknado-turned-time-machine and encounters everything that history can throw at him. Sent back to the prehistoric age by his son in an effort to save the world, Fin must battle through time to stop the very first Sharknado from ever happening. Joined by his friends on this epic journey, Fin must go back to where it all began: The original Sharknado.