Gearteeth

On the brink of humanity's extinction, Nikola Tesla and a mysterious order of scientists known as the Tellurians revealed a bold plan to save a world ravaged by a disease that turned sane men into ravenous werewolves: the uninfected would abandon the Earth's surface by rising up in floating salvation cities, iron and steel metropolises that carried tens of thousands of refugees above the savage apocalypse.

Twenty years later, only one salvation city remains aloft, while the beasts still rule...