The setting of the film takes place in a primordial land, filled with ruins of buildings and starts with two nameless characters. One of these is a young girl who scavenges a desolate city while protecting a large egg, which she believes will hatch into an angel. The other is a boy with a large gun who disembarks from a tank.
The girl encounters the boy who questions her about what the egg contains and suggests breaking it, leading to their brief bonding. He wishes to break it to see what's inside. The boy recounts a story that sounds like an alternate version of Noah's Ark in which the bird never returned and never existed and the ship kept sailing. The girl tells the boy that the bird did exist, and brings him to a fossil of an angel.
Later, the boy smashes the girl's egg while she sleeps. This prompts her to look for him and ultimately fall into a body of water, where a large number of eggs appear. After this, the world shown in the film is revealed to have been on top of a shape that looks like the hull of an overturned ship.
