To get back at her cheating ex and the homewrecker, Wen Nuan decides to feign memory loss and attaches herself to the homewrecker's powerful uncle, Meng Huaiqing, by claiming to be his "long-lost sister." Initially annoyed by this uninvited sister, Meng gradually develops feelings for her. Just as he schemes to trap her under the guise of brotherly care, he accidentally uncovers her vengeful deception.