The United Kingdom's coastline turns out to hold some of Europe's wildest remaining habitat, and this film travels the length of it to show why. Cameras move from the Shetland Islands down to Cornwall, taking in the Hebrides and the Pembrokeshire Coast National Park in Wales, where cliffs host large breeding colonies of seabirds. On the sparsely populated Hebrides, rock, sand, and moorland form biotopes for puffins and guillemots, filmed at close range in their nesting grounds. The film sets this natural wealth against a real threat: plastic pollution, chemical runoff, and habitat loss driven by overexploitation, compounded by fears that environmental standards will slip further after Brexit. Ecologists and local conservationists appear throughout, describing the projects that protect specific breeding sites and endangered species, from seabird colonies to coastal moorland. Rather than a single narrator's argument, the film builds its case location by location, letting the wildlife footage carry most of the evidence. It closes on the conservationists' own cautious optimism that public attitudes toward these landscapes are shifting.