The positronic brain of robot RB-34 (Herbie) has an unforeseen 'extra': he can read human thoughts. So his take on the First Law of Robotics is unorthodox: he tells human beings only what he believes will not hurt their feelings. Can renowned robopsychologist Dr. Susan Calvin 'fix' RB-34? Or are there areas of her own psyche where she would rather not hear the truth?