Yara leads a double life: at school, she is a normal girl with annoying half-brothers and a passion for playing the piano. But in reality, she is a princess of the sea—a mermaid, hidden from the human world. No one knows her secret, not even her best friend. When one day her two lives collide, it is Nuri, the mysterious town heartthrob, who crosses her path. Reluctantly, she lets him in on her secret—and realizes that their worlds are more closely connected than she thought. Between ancient myths, a fight for survival, and a love that cannot be, Yara must decide: human or sea?