Lorn, a boy from the snowy wastes, accidentally swallows Star Ash, which can devour out-of-control magic but takes away memories. He forms a mercenary band with five companions, each bearing their own scars. From Black Iron contracts to expeditions across the continent, they travel through wondrous lands and get swept into wars, growing through power, sacrifice, and responsibility. In the end, they must face a difficult choice: Does saving someone give you the right to decide their fate for them?