A nymph sworn to the sea. Three human men who give her a reason to leave it behind.

Thelsa is one of the last nereids left in the world. While her sisters play games with tourists and collect trinkets in exchange for song, Thelsa watches the town’s watchmen. The three men train each morning by the sea, unaware that the quiet girl who joins them is not entirely human.

When a rescue mission reveals her true nature, Thelsa becomes something more than a seaside mystery. Kaveth, Harun, and Neo offer her friendship, then gifts, and eventually something deeper. But love between mortals and immortals carries a cost.

As the bond between them deepens, Thelsa’s sisters grow wary. The more she is pulled toward the human world, the more she risks losing everything that ties her to the sea. And if she chooses wrong, it may not be just her heart that breaks.