A “cast-off colony” is a world of techno-magic, a world where magic has a place: it moves transport, heats homes, and from it weapons are created. In Interra, mighty sorceresses and non-humans from another reality live as well—creatures that hunters pursue. Ignat is a hunter. While carrying out a completely ordinary job for non-humans, he finds an unfamiliar rune, and this discovery flings him into a furious swirl of intrigues and mysterious events.