Claire, still recovering from a leg injury, brings her daughter home for her younger brother Ethan’s engagement banquet—only to be mistaken by Chloe, Ethan’s first love, for a mistress who has come with an illegitimate child to steal her man. Ignoring warnings about her identity, Chloe constantly humiliates and harms the mother and daughter, even dragging them into a private shark pool. Only when Ethan recognizes his sister does he see his first love’s true face. In the end, brother and sister join forces to fight back, and Chloe loses her engagement, her career, and her freedom.