In a picturesque village by a lake, legends about water creatures are part of everyday life. The story follows a young fisherman named Tom, who spends his days dreaming of adventures beyond his monotonous surroundings. One day, while casting his net in search of a fish, he encounters a beautiful water nymph named Melusina, whose beauty is unmatched and whose existence defies logic.
The connection between them is instantaneous; Melusina, enchanted by Tom's bravery and curiosity, invites him to explore her submerged world filled with wonders and magic. However, the harmony they have found is threatened by the jealousy of an old fisherman from the village, who, fearful of losing his monopoly over the lake, decides to capture Melusina to exhibit her as a curiosity.
As the story progresses, Tom faces a dilemma: risk his own life to save Mother Nature and his true love, or abandon Melusina to follow the safe path offered by the other villagers. With a nostalgic atmosphere and dreamlike visuals, the plot delves into themes of love, sacrifice, and the conflict between the mundane and the magical. In the end, Tom must choose between loyalty to his home and the pursuit of the extraordinary, leading the audience to a profound reflection on love and connection to nature.