After a failed attempt to find the perfect birthday present for his beloved next-door neighbor, Mr. Wilson, the mischievous seven-year-old little terror, Dennis Mitchell, learns that his young-at-heart grandfather, Mr. Johnson, is moving in with them. As a result--exhausted and jealous, Mr. Wilson will fall prey to a conniving pair of swindlers intent on rinsing him for every penny with their endless array of bogus youth remedies, however, not if Dennis can help it. He always had Mr. Wilson's best interests at heart. Will he manage to keep their friendship strong?—Nick Riganas