On a rainy night, Su Wan is forced to take the place of her missing twin sister, Su Qing, and marry Gu Yancheng, the CEO of Gu Group. She thinks it is merely a sham marriage to appease their families, but she soon realizes that her sister’s disappearance is shrouded in mystery. A diary has vanished from the bedroom, her stepmother Liu Mei is strangely attentive, her stepsister Su Lin is hostile, and the probing look in Gu Yancheng’s eyes all suggest that this marriage is a trap.
To find her sister, Su Wan secretly investigates under the identity of “Mrs. Gu.” She discovers that the Su family’s trillion-yuan fortune is being transferred, and that the trail overlaps with a mysterious transaction by Gu Group. Her stepmother repeatedly frames her, but Gu Yancheng gradually stops watching from the sidelines and becomes her ally. As suspicion gives way to trust, the two begin to fall for each other.
An even bigger shock follows: a blood test confirms that Su Wan is not the Su family’s biological daughter, but the heiress of the wealthy Lin family, switched at birth twenty years ago. Her sister’s disappearance turns out to be deeply tied to the mix-up, an old feud with the Lin family, and a power grab by Gu Group’s senior executives.
No longer willing to be pushed around, Su Wan joins forces with her birth family and Gu Yancheng. She battles her stepmother’s faction for control in the business world while conducting an international search for her sister. In the end, she uncovers proof that her stepmother conspired with Gu Group’s senior executives to steal wealth and commit murder, rescues her imprisoned sister, and brings the villains to justice.
Su Wan not only reclaims everything that belongs to her, but also merges and expands the businesses of the Su and Lin families. She transforms from a stand-in dependent on others into a rising star in the business world, and joins hands with Gu Yancheng to achieve success in both love and career.
