Gu Chuan and Ye Manqi have an extramarital affair, deceiving his wife Shen Qinghe by claiming Ye Manqi is just a temporarily staying neighbor's younger sister, and asking Shen Qinghe to take good care of her. Shen Qinghe accidentally sees through the truth, feigning tolerance on the surface, proclaiming gratitude to Ye Manqi for giving birth to a child for the Gu family, and even promising to leave the company to the child. Privately, she collects evidence of Ye Manqi's affair and clues about the child's biological father, sets up a shell company trap, and lures Gu Chuan into investing funds. After the child is born, Shen Qinghe proposes a paternity test, and Gu Chuan secretly switches the newborn and bribes a doctor to fake it. Shen Qinghe directly produces irrefutable evidence of Gu Chuan's infertility. Gu Chuan's conspiracy is exposed, and he kneels and begs, but Shen Qinghe still resolutely divorces him.