As shown in the trailer, Reggie is a happy-go-lucky little Border Terrier who loves his life and his crotchety owner Doug. Doug seems frustrated about life and ill-treats his furry companion, but optimistic Reggie doesn’t mind, calling him the best owner in the world.
Doug makes several attempts to abandon Reggie by throwing him a ball in a wilderness somewhere and taking off with his car. But Reggie always manages to get home. One day, however, Reggie winds up getting lost in a game of fetch, and ends up meeting a group of stray pups.
His new stray companions enlighten Reggie that his owner had abandoned him, who was earlier under the impression that Doug would come back for him. Frustrated Reggie then vows to trek his way back home and seek revenge on Doug, clearly putting it, “I’m gonna bite his dick off!”
Reggie and his doggie friends take a hysterical trip, where they teach him some survival tricks, and he learns that he doesn’t need an owner to be happy. But the ultimate goal is to avenge Doug.