Marga was known as the favorite headache of everybody around her and that includes the not-so-kind Neo Sebastian Figueroa, her bestfriend's brother. Marga loves Neo Sebastian since she knows how to talk. However, the cold and ruthless Sebastian does not give a fuck. But Margarita will never be enough for she will always be a remembrance of pain, suffering, and force. She will never be enough for her mother... and she will never be enough for Sebastian because she will never be her sister, Mari. Marga is the rebel princess because she was a daughter out of affair to her mom's first boyfriend. But everything turned even worse when she was blamed for her sister's suicide. Suicide? Is it a suicide or a foul play of something unknown? And then she lost the only person who stayed with her. Will she be able to win everyone's heart like she desired? Or she will settle to be a remembrance of being a headache and pain. Will she be an Ariel with her Erik or a siren under the sea.