Demon Bingyan has no feelings for humans. Mo Xibing, a unique humanoid computer, has its own consciousness due to being infected by an unknown computer virus. He loves humans and wants to be human. The doctor invented the space-time machine and placed the space-time machines in the bodies of Yan and Bing respectively. Only when the two of them are together can they travel through time and space. The doctor asks the two to find their "hearts".
The two met different people in various time and space, felt betrayal, trust, pain, sadness, joy, etc., And learned how to be a "person".