Lin Yiyi is a genius painter who accidentally killed her twin sister Lin Yuanyuan, who looked the same as her, due to jealousy from wealthy heiress Susan. In order to help her sister seek revenge, Lin Yiyi changed her name to Lin Qian and had her face changed to that of her enemy Susan, hoping to go to the Su family for revenge. By chance, she learned the secret that Fu Shi Yan, the CEO of the Fu family, was allergic to women. Lin Qian and her mother, who worked as a maid in the Su family, conspired to go to the Su family as a maid. Taking advantage of the rumor that Fu Shi Yan was cheating on her wife, Lin Qian designed Susan to be her substitute and withdrew from the marriage with Fu Shi Yan. In fact, she took this opportunity to cultivate a relationship with Fu Shi Yan and used her mysterious identity to trick Susan out of the Su family. Taking advantage of the time difference to go home and replace Susan, Su's mother suspected that Lin Qian secretly did a paternity test, but was rescued by Lin Qian and his sister's doctor boyfriend. As a result, Lin Qian completely gained Su's mother's trust, Susan was imprisoned and abused by her mother in a villa, but her father escaped from the villa after returning home. Susan sought revenge against Lin Qian but was scolded by Fu Shiyan. Susan swore to regain her identity and called a mysterious person for help. Under the guidance of the mysterious person, Susan tried to expose Lin Qian's identity with a painter's signature. In the end, Lin Qian successfully drew a signature to slap Susan and completely replaced her identity. Susan was then locked up in a doghouse by her mother, and Lin Qian confessed to Susan that she was the mysterious painter who slapped Susan. Susan revealed her secret of killing Lin Yuanyuan in order to prove her identity. Lin Qian hid a camera and captured evidence in advance. Su's father presented a paternity test to prove that Susan was his own daughter. The Su family asked Lin Qian to come home and question her, but Lin Qian openly admitted that he was not Susan. At this time, the police arrived and took away the murderer Susan. Finally, Susan went crazy in prison. Fu Shiyan sent all the Su family members to prison and married Lin Qian. At this time, Lin Qian learned that he was pregnant with his child. In the end, Lin Qian successfully avenged his sister and gained love