Story of a Mermaid (2002)

Eun Ariyoung is a successful television drama screenwriter with a past. Her father Eun Jin-sub had an affair and left their family for the other woman, and shortly after her autistic brother died and her mother Han Kyung-hye went blind. Ariyoung's unrelenting hate for her father throughout her childhood and adolescence drives her to meticulously plan her vengeance. Knowing that Jin-sub's new wife Shim Soo-jung is a popular actress, Ariyoung works her way up the ranks until she earns enough cachet in the TV industry. Then she writes a script that's a thinly veiled autobiography of her father's affair and its aftermath, and casts the unsuspecting Soo-jung in the role of the blind mother to make her feel guilty. To complete her revenge and cause the maximum amount of pain, Ariyoung also plots to steal the fiance of her half-sister Eun Ye-young, the gentle-natured Lee Joo-wang. Helping Ariyoung in her plans is Jo Soo-ah, her mother's friend whose ulterior motive is that she wants Ariyoung to marry her son Ma Ma-joon. But Ariyoung finds herself falling in love with Joo-wang for real, and she eventually realizes that there is more to life than hatred and learns the true meaning of forgiveness.