In a ruined, nameless city of the future, a woman named Rachel, who makes her living as a scavenger, finds a creature she names “Borne” entangled in the fur of Mord, a gigantic, despotic bear. Mord once prowled the corridors of the biotech organization known as the Company, which lies at the outskirts of the city, until he was experimented on, grew large, learned to fly and broke free. Driven insane by his torture at the Company, Mord terrorizes the city even as he provides sustenance for scavengers like Rachel.

At first, Borne looks like nothing at all—just a green lump that might be a Company discard. The Company, although severely damaged, is rumoured to still make creatures and send them to distant places that have not yet suffered Collapse.