The document discusses the heritage, value, and practices of Haenyo women divers and the marine culture of Jeju Island, South Korea. It notes that Jeju Island has abundant stone, wind, and women referred to as the "Three Plenties" and that Haenyo women divers and the culture integrate the land, sea, and people of the island in a practice called Nissology, the study of islands. It concludes by stating the document will cover the food of Jeju Island.