A young mermaid, Dyesebel, takes on a journey to trace her origins until she finds out that she is the daughter of a merman and a human. Disowned by the sea for being the child of Tino who was the prince of the sea and the human Lucia, she starts with her adventure and explores the human world where she will meet Fredo. But this journey will be marked by a realization that she is not accepted by both worlds. And as a war between man and the underworld appears imminent, Dyesebel will choose to leave those that she loves.