Children's fantasy drama. Eleven year old Siren (Emmy Perry)'s life changes dramatically when she discovers she is a mermaid, with her special abilities due to reveal themselves on her 12th birthday. As she comes to terms with her true self, Siren discovers that a gang of mermaid hunters are after her for the healing properties in her mermaid blood. With the help of her friends, will Siren be able to escape the hunters and realise her destiny?