High in the sky, a peregrine falcon joins her mate for some swooping and diving before returning to her nest to guard her eggs. The couple doesn't know it yet, but they will lose most of these eggs - the first clutch to a volunteer scaling the cliff, and the next to the harmful effects of DDT. The story of several generations of falcons as they're taken to a sanctuary, reintegrated into the wild, and ultimately relocated to the ledge of a city skyscraper.