On Nuannuan's birthday, her father took her to have dinner at his first love Liu Su's house. During the meal, Liu Su's daughter framed Nuannuan, causing her to fall and be stabbed by a claw clip. On the way to the hospital, the blood bag was snatched away by her father, and eventually Nuannuan died from excessive blood loss. After her daughter's death, the unborn child in the womb of Nuannuan's mother, Yunduo, was also killed by her husband and his first love. With the help of Yunduo's mother, although deeply grief-stricken, Yunduo resolved to launch revenge and make those who harmed them pay the price.