Su Wan and Gu Jingshen both met tragic ends in their previous lives and are reborn together just before the substitute marriage scandal. Su Yao, who was supposed to marry into the Gu family as a substitute bride to bring good fortune to her ailing groom, refuses to go through with the marriage. Su Wan voluntarily marries into the Gu family instead. Gu Jingshen pretends to be frail and sickly. After testing each other, the two discover that they have both been reborn and form an alliance. Together, they resolve the internal conflicts within the Gu family, thwart the schemes of Su Yao and Lin Qinghuan, gather evidence, and expose the mastermind behind everything, Gu Changming. All the villains are punished according to the law. Su Wan reclaims her mother's inheritance, Gu Jingshen secures the family's business, and the two remain together, finally achieving a happy ending.