Cody and Taz are completely infatuated with racing. The chocolate lab and Australian shepherd are always racing along the pasture fences pretending to be all time famous racers who they call ‘Rocket Hounds’ after the famous racer Rocket. At first, they have no idea that the greyhound at Oaktree is the infamous racer. The retired race horse on the farm also puts ideas in their heads.
When the pups sneak off to find the race track, Rocket has no other choice but to follow after them. After he finds himself back at the track, he must run the race of his life to bring the pups back home safely and save the other retired greyhounds from a gruesome fate. Can one old dog bring them all home?