A young and timid boy, Danny, imagines a wonderous world in which he and his cherished dog, Charlie, star in their own superhero adventures. When Charlie is mysteriously abducted by aliens, he is gifted true superpowers and emerges as Charlie Wonderdog, the greatest and most famous superhero dog the world has ever seen. He is beloved by all except for Puddy, the evil cat next door. With the fate of humanity hanging in the balance, Danny and Charlie must go above and beyond to thwart Puddy's diabolical plans.