Tristan da Cunha is a volcanic speck in the South Atlantic, roughly 1,500 miles from the nearest continent, and home to fewer than 250 people. It has no airstrip. The only way in or out is by ship — a journey that takes about a week from Cape Town, and only runs a handful of times per year. Even then, as this documentary opens by pointing out, a ship can arrive and still fail to deliver: rough seas can strand cargo offshore for days.

What makes this worth watching isn't the scenery (though the 4K footage helps). It's the practical logistics of a society that has to function largely on its own. How do you run a hospital when a specialist consultation means a two-week round trip? How does a community share farmland when every household descends from the same handful of 19th-century settlers? What happens when the potato crop fails — the island's staple — and the resupply ship isn't due for months?

The documentary walks through the island's economy (crayfish exports, mostly), its governance (a single elected Chief Islander), and the strange constraints of a place where everyone knows everyone and the nearest emergency room is on another continent. It's a genuine look at how humans organize when the usual assumptions about supply chains and mobility simply don't apply.