In the town of Socorro, New Mexico (one year prior to the formation of the Road Rovers), Professor William F. Shepard was forced to relinquish experimental transdogmafier technology to General Parvo in exchange for his lost dog, but instead Parvo gives him a bomb that destroys his laboratory.
Next year, as normal dogs begin to mutate into monsters, Shepard, who miraculously survived the attack, takes measures to stop Parvo who is behind this, and chooses five dogs to become Road Rovers. Although most of the laboratory no longer exists, the Road Rovers use the earthly underground while on duty. Professor Shepard lives here with his dog Muzzle.