This is the story of a boy who had a rusty washer he called the "red button," his old Trinket robot, and his very poor, busy parents. He and his parents live in an underground city where at this time the poor people lived.The old robot was managed by Peo's parents to be the teacher, to teach him the school subjects, as well as to take care and to be a friend to Peo.Peo and his Trinket robot have developed a great friendship.Peo heard from his mother many stories about the surface of the earth, which at this future time was overcrowded.He heard about the blue sky, about the flowers, birds, big trees and the ocean. He heard about the "precious things" lying on the surface.He decided to get to know the surface and so he and his robot started a great adventure!