In a quiet coastal town, a young sailor on shore leave becomes enchanted by a mysterious woman who performs as a mermaid at the local carnival. Mesmerized by her beauty and the mystical aura that surrounds her, he finds himself drawn into her world, eager to understand the nature of her existence. Despite warnings and strange tales from locals about the woman's past and the suspicious disappearance of her previous lovers, the sailor’s fascination only grows stronger. He dismisses the rumors and decides to pursue a relationship with her, undeterred by the whispers of danger that seem to echo with every wave crashing against the shore.

As their connection deepens, the sailor begins to notice unsettling occurrences that blur the lines between reality and folklore. The woman’s aloofness and mysterious nighttime disappearances lead him to wonder if the legends surrounding her might hold a kernel of truth. Torn between his affection for her and his growing apprehension, he embarks on a personal quest to uncover the truth about her identity. His investigation leads him down a haunting path, where love and obsession collide with ancient myths and the possibility of a supernatural reality. As he delves deeper, the sailor must confront not only the enigmatic nature of his beloved but also his own reasons for ignoring the potential peril that comes with loving someone who may be more, or less, than human.