His grandfather teaches him how to properly use tools, and the boy slowly learns. Finally, he creates his own key and leaves his grandfather, though reluctantly. Meanwhile, the scientist's poetry-composing robot decides to run away and show off his talent to the world. Instead, he ends up drunk, and after coming back to the laboratory hits and maims the small robot which put the lock on the door to happiness. The scientist takes the robot to the grandfather's apartment and asks him to fix her, but the grandfather's eyes are not good enough. Just then, the grandchild comes back and says that he wants to stay with the grandfather. He's able to fix the little robot.