As Simon Pei’s wedding approaches, his sister, Lily Jiang, returns from abroad, sparking a misunderstanding about their close relationship. Rachel Su, Simon's bride, believes Lily is his mistress and humiliates her publicly. At the wedding, Lily’s true identity is revealed, exposing Rachel’s jealousy and insecurities. The truth unravels, leaving Rachel embarrassed and Simon caught between family loyalty and marital tension.