In a world covered in miasma, a floating castle is the last refuge for mankind. The earth is scarred
with beasts mutated by the plague while Welkin Castle is quarantined from the horrors below.
Lucien, a charismatic politician protected in the castle walls, discovers an ancient book where he
learns of the Exemplars, weapons that can turn into sentient soldiers. He joins forces with Rowena, a
revenant determined to find a way to come back to life to raise her living son, and the two
reluctantly make a pact to overthrow the mad tyrant controlling Welkin.