In 2264, global warming, the summer temperature as high as 54 degrees. Humans don't have to go out, and AI robots (AI people for short) do everything for them. AI people have no thinking ability when they first leave the factory. It was not until they were bought by customers and set up their master status that their minds were activated and they could think independently. AI people have no feelings, no love, and must obey their master's orders. They can't deceive humans, or they will be destroyed by robots.

Sister Ren Xing is a loyal AI nanny. She has a face 18 years old, but she is only 10 years old. Yi Zhu, the owner of Renxing's sister, died, leaving an 8-year-old son Zhen Congming and a 6-year-old daughter Zhen Meili. Zhu Yilin told Sister Ren Xing before she died that she must take good care of her two children. Sister Renxing told the children about Zhu Yi's death. The children didn't believe her and kicked her out of the house, saying that they never wanted to see her face again. Sister Renxing met Master Lu, an old technician in the robot factory. She thought that as long as Zhu Yi's face was shaped and she went home, the children would accept her as long as they thought it was her mother. Master Lu helped her with plastic surgery. When she finally turned into Zhu Yi, she found that the children had accepted the fact that their mother had died. ...