Six divers work the Foveaux Strait off the southern tip of New Zealand, hauling up sea urchin, known in the trade as kina, for buyers who ship it to fine-dining kitchens worldwide. The strait sits between the mainland and Stewart Island, a stretch of water known for sudden storms, heavy swells and water cold enough to numb hands inside a wetsuit within minutes. The film follows the crews through their daily runs, showing the compressor-hose diving gear they rely on instead of scuba tanks, the boat work of sorting and bagging the catch, and the physical toll of repeated dives in a season that does not wait for good weather. Interviews with the divers cover why they keep doing a job with a real chance of drowning, decompression injury, or a shark encounter, and what the kina trade actually pays once it reaches a plate on the other side of the world. The footage stays close to the boats and the water rather than dressing up the industry, and the divers' own account of the risk carries the film.