In 2197, artificial intelligence (AI) has developed to the point where it can replace most humans in daily tasks. Not only do they have strong learning capabilities, but they can also have the same joys and anger as humans. Almost everyone has a home smart robot in their home, and Zheng Xin is no exception. After moving out of her home, she asked a friend to buy a new robot directly from the factory, but she didn't expect...
Zheng Xin: Well, we shouldn't have moved out in the first place. If we hadn't moved out, we wouldn't have bought the robot. If we hadn't bought the robot, we wouldn't have reduced the trial period for the sake of cheapness. If we hadn't reduced the trial period, we wouldn't have kept it. If we hadn't kept it, we wouldn't have ended up in this situation...