The Tibble twins watch a violent cartoon and start dressing and acting like the protagonists: a duo of superhero crime-fighting robots. They play roughly while pretending to fight crime and throw a swing into D.W.'s face, sending her to the emergency room. They apologize and agree not to watch the show anymore, and D.W. forgives them. D.W. wants a tooth pulled out so that she can get money from the Tooth Fairy to buy a toy barn for her unicorn doll. When her plans do not work, she tries to trick the Tooth Fairy with a fake tooth. Arthur replaces the tooth with his money, worried that the Tooth Fairy could be offended by the fake tooth.