Li Weiwei, chief engineer of a technology company, is an AI ethics consultant who suffers from emotional disorders. In order to test a new generation of emotional companion robots, the rational heroine is forced to live day and night with an AI that can accurately simulate love. Unexpectedly, she discovers that all the "affectionate codes" come from her forgotten first love - the genius programmer who ran away because of her rejection. When the AI held her hand on a rainy night and said, "This time I will learn the human heartbeat," the real programmer was standing behind the one-way glass in the laboratory, silently recording every arc of her smile.
