Su Jin, who grew up in the countryside, was told at the age of eighteen that she was the mistaken daughter of the top wealthy Lin family. She returned to her biological parents with great expectations, but found that there was no place for her in the family. Preferred by her parents, protected by her brother, and deeply loved by her fiancé, they were all Lin Wan'er, the fake daughter, who had replaced her in her life. Lin Wan'er is pitiful, but she has repeatedly framed her secretly. Her family's misunderstanding of Su Jin is increasing day by day, and they eventually regard her as an abandoned child and attempt to use her in exchange for the benefits of a business marriage.