After unintentionally saving Viola the princess, a mermaid called Shizuho falls in love at first sight. After many twists and turns, Shizuho finally entered the human world only to find out that Viola had been married to a neighboring prince for quite some time. She was agonized by the unrequited love. But when she found out about a mysterious enemy aiming for Viola, Shizuho chose to stay on the land. The calm and peaceful Sea of Cyprus, what secrets are swallowed up by its waves? Can a mermaid’s love ever come true?