In the finite confines of the Manifold, a five-dimensional world laid out across the inner surfaces of a penteract, factions vie for access to the limited arable land and mineral resources required to keep feeding civilization. Mercenary airships, aerostat skystations, and dieseltech auto-armor are the swords and shields of a many-layered multiverse teetering on the brink of war. The alien environments of realms adjacent to the city-cubes teem with untold wealth - and untold threats.