The story is set in the year 2035 when a self-aware female robot enters a human family. Throughout her journey, she fights many enemies to protect her family and friends. She becomes in tune with her humanity as she grows, matures and learns about love.

In Shehong City, a man who feels that there are too many household chores buys a robot with the model "synth 2035" to help take care of his children. He names the robot An Yi. His wife is strongly against the idea and it becomes a source of their quarrels. After a while, they notice that the robot is behaving strangely. She seems like a human rather than a robot. A young man, Li Yao, is in the city searching for the whereabouts of An Yi while at the same time avoiding the pursuit of Professor Huo. It turns out that Li Yao's father invented four "synths" with human emotions to be companions for Li Yao.