Spunky, young Ruth dreams of being a Knight of the Round Table. But King Arthur, Guinevere, Lancelot and her other heroes laugh at her when she demonstrates her valor in a battle with a melodramatic lizard pretending to be a dragon. Humiliated, Ruth sets off to form her own queendom that is bigger and better than Camelot, bringing with her the lizard and a mule that she claims is a unicorn. Soon they are joined by a frog, whom Ruth declares to be an ogre; a skunk, whom she pronounces a wizard (because the skunk makes everyone disappear); and two kids, whom she dubs her bravest knights. On their quest, they meet the enchanting Lady of the Lake, a bumbling Merlin, riddle-loving trolls, a vain unicorn and the evil sorcerers Morgana le Fay and Mordred, who have their own plan to outdo King Arthur.