On the first day Ye Kong returns to her biological parents' home, she is assigned to take another woman's place in an arranged marriage. Sharp-tongued and dangerously unpredictable, she exposes the fake heiress's true identity through her interactions with her family. Using her own unconventional methods and hidden identities, she fights against the family members who refuse to accept her, all to remain in the Ye household and uncover the truth behind a case from years ago.