It all started with a curse. When magical mermaid Sereia saves her little sister and overshadows brother and the sea's rightful heir, Triton, the position of next ruler of the sea is in question. Determined to keep his throne, Triton curses Sereia, transforming her into a human and stripping her of magic. Banishing her from their underwater kingdom, he gives her a final warning: if you should ever return, you will become a monster. Left for dead, Sereia washes up on the shores of Atlantis, where she is discovered by a kind merchant with a tragic past. Patient and charming, he helps her...