Su Jianjia and Su Yunshu were sisters. They married their father and son on the same day. Originally, Su Jianjia married Shen Heting, the Marquis, and Su Yunshu married Shen Zhui, the Marquis's adopted son. However, they secretly exchanged Huajiao. Su Jianjia went from being the mistress of the Hou family to being the wife of the adopted son in the mansion. Everyone thought that she had orchestrated this marriage exchange conspiracy. They hated her, hated her, and tortured her in every possible way. She struggled to survive in the Marquis' mansion. Unexpectedly, she accidentally discovered that her husband was actually having an affair with his cousin. The wrong marriage was a carefully planned conspiracy by them, in order to make the two of them the legitimate son of the Hou family. Su Jianjia, who discovered the secret, was tragically killed. Her mother and younger brother were also buried in the flames with her, and the whole family was silenced. When she opened her eyes again, Su Jianjia unexpectedly returned to the day when she married into the Hou Mansion. This time, she wanted to set things right and become the mistress of the Hou family again, and trample Su Yunshu and Shen Zhui under her feet, so that all the treacherous plans they had been planning to do to exchange relatives and poison the Hou family would be in vain. After her rebirth, Su Jianjia protected her family, defeated evil spirits, and fell in love with the Marquis Shen Heting. Su Jianjia gained the perfect and happy life that originally belonged to her.
