Reggie, a timid Chihuahua that resembles a rat, knows the streets away from his neighborhood are risky, but when two Pitbull puppies go missing he has to rescue them from Dan the dogcatcher and his mean intentions. Reggie can't do it on his own so he calls on his close friends to help. Shy, and scared, the heroes don't rely on magic or potions when facing danger, they find their inner strengths. Reggie realizes that what makes him different is actually what makes him special. He earns his street name-Ratdog!