Since the descent of the Iron Curtain, Berlin has been divided by an imposing wall. Unbeknownst to the citizens of Berlin, two angels, Damiel and Cassiel, watch the over the city. Adults cannot perceive the existence of these angels while children seem to be vaguely aware of them. As Cassiel says, their reason for existing is to assemble, testify, and preserve reality. While some of their subjects dream of peace and others have given into despair, Damiel eventually learns of a trapeze artist named Marion. Living by herself in a caravan in West Berlin, she is a very lonely, depressed individual. To his surprise, Damiel begins developing feelings for her, and contemplates a decision that will forever change the nature of his immeasurably long existence.