The arrival of the Age of Discovery made European nobles realize for the first time that there was an endangered creature - the mermaid - living in the depths of the ocean. There has been no progress since they first caught two fish. Humanity's thirst for knowledge is endless. For more than a hundred years, humans have fished countless times in the sea, but found nothing. Until 1768, British aristocrat Kevin Stock found a male mermaid during a sailing adventure. Kevin named him Isidore, which means a gift from the goddess. What he never expected was that this creature, which had always been regarded as a pet by nobles and a research object by scientists, would actually make him surrender his heart.