During a beach vacation with his friends, Miles decides to take a walk on a nearby dock for some alone time and fresh air. But he stumbles upon a figure, covered in sea weed, laying in the sand. He meets Serenade, a sweet, soft looking girl. But she is not what she appears, she's a siren. Sent from the depths of the ocean to retrieve more victims for her family. However, things take an unexpected turn when Miles decides to befriend her and make her a part of human society.