The solution is an old robot, a combat robot that represents the most advanced technology in the war years. The end of the war meant that it would be destroyed. The commander couldn't bear it and pulled out the chip privately, just to leave a way for Xie to survive. Five years later, when robots spread all over the house, Xie's chip was accidentally inserted into the body of a home robot, restarting the world of peace. Is it fate or conspiracy, meeting the family of the expert who created him...