Siren Phillips has lived her life thinking she's an ordinary girl, in an ordinary town       On the eve of her twelfth birthday, however, she learns that she is far from ordinary       Destined to turn into a Mermaid at the age of twelve, Siren must struggle with her new reality, saying good-bye to her mother and friends, while she transitions into the water       To make matters worse, a group of hunters are trying to catch her       She soon becomes friends with Adam Wilts, a new boy at school, who she turns to for help       He agrees to help her, but finds himself caught in the middle, when it's his own father who is after Siren       When Siren's mother is taken, the town must rally behind her, and help her make a peaceful transition into the water, before the hunters can find out where she is