Bobby is a bright child who looks forward to the new school year, as he will have in class his favorite teacher, an older woman named Miss Gilden(played by Helen Hayes) Unfortunately, Bobby develops health problems, and is unable to attend, though in a bizarre development, somehow a lookalike alter-ego of his comes into being, and offers to attend in his place informing him of all teachings. Trouble is that this alter-ego is an evil version, as he hates Miss Gilden and ruins her entire life. Despondent, both Bobbies engage in a final battle of wits, though good Bobby gets aid from an unexpected source... Unsatisfying yarn is initially interesting but goes nowhere ultimately, though Hayes is a delight in strangely written role.