In "The Last of the Sea Women," an extraordinary group of fierce grandmother warriors wage a spirited battle against mighty ocean threats. Often referred to as real mermaids, haenyeo divers on South Korea's Jeju Island are famous for diving to the bottom of the ocean - without oxygen - for centuries to collect seafood for a living. Today, with most haenyeo in their 60s, 70s, and 80s, their traditions and way of life are under immediate threat. But these fierce, funny, hardworking women refuse to give an inch, helping a younger generation fight to revive their ancient lifestyle through social media. What drives Haenyeo young and old, this moving documentary explores close friendship, savvy independence, and an infectious sense of power contagion, unfolding into an uplifting story of women who take on world power to protect their beloved ocean and inspire a new one. generation.