Birds fly thousands of miles twice a year, and this film gets airborne with them, using ultralight aircraft, gliders, and boats rigged with cameras to fly wingtip to wingtip with geese, cranes, storks, and pelicans rather than filming them from a blind on the ground. The crew spent three years shooting across all seven continents, following specific migrating flocks from the Arctic tundra to the African savanna and back, through storms, hunters' shotguns, and industrial landscapes the birds have to cross whether or not anything down there wants them to survive. There is almost no narration and very little spoken explanation; the film trusts the footage itself, close enough to catch a wing beat's rhythm or a goose's eye mid-flight, to carry the story of what a migration actually costs a body. Brief captions name locations and species as the route moves from continent to continent. The result plays less like a nature lecture than like a long, wordless flight alongside creatures that treat a transcontinental crossing as routine.