It centers on the extraordinary adventures of the easily frightened dog Courage, who has to face his fears in order to rescue his elderly farm owners from all sorts of dangers.
Courage embarks on terrifying and hilarious adventures when he stumbles upon a magical tree that grant wishes, sees an angry mummy seeking revenge, and an accident turns Muriel into an invisible woman.
Muriel is mistakenly arrested after the arrival of her mysterious new neighbor, Maria, and her husband, before revealing bad intentions to steal a diamond while posing as poor Muriel, while the Farmer tries to replace Courage with a supernatural robot dog.
Despite his constant fear, Courage is forced to confront a stubborn beaver that threatens to flood the house, before he finds himself facing terrifying rats carrying out an evil plot to the tunes of “The Nutcracker.”