The show's premise is that the title character, schoolyard bully Eddie McDowd, is punished by a man called The Drifter because of Eddie's behavior. The 17 year old finds himself very attractive and powerful and so he bullies others without mercy. The Drifter plans to make Eddie pay for his wrongdoings and turns the boy into an Australian Shepherd/Siberian Husky mix and has Eddie do 100 good deeds before he can be turned back into a human.

Source: Wikipedia.org