The story of Underdog’s mysterious origins begins in the wake of an accident in the high-tech lab of the maniacal scientist Dr. Simon Barsinister. Suddenly, an ordinary, down-and-out young Beagle named Shoeshine finds himself with extraordinary powers, not to mention the unexpected ability to turn his bark into real speech. Now, armed with a “fetching” superhero costume, this unlikely caped crusader and humbly self-described Underdog vows to protect the beleaguered citizens of Capitol City--especially one beautiful Spaniel named Polly Purebred. When a sinister plot by Barsinister and his overgrown henchman Cad threatens to destroy Capitol City, only Underdog can save the day.