The inhabitants of the Megastructure are rarely human. The world is populated by Silicon Life—cyborgs and androids who view humans as pests or illegal residents—and the Safeguards, a defense system designed to eliminate unauthorized humans.
The series follows , a stoic, nearly silent protagonist wielding the Gravitational Beam Emitter , one of the most powerful weapons in fiction . Killy wanders an endless, ever-expanding labyrinth known as The City .
(pronounced "blam") is a landmark work in the cyberpunk and seinen (adult male) manga demographics. It is renowned for its minimal dialogue, architectural obsession, and a sense of scale that dwarfs almost any other work in the medium.