Grisha are people who can practice the 'Small Science'. Ravka is one of few places they can live safely; there they are trained for the Second Army and divided into three orders. Etherealki summon natural elements like wind or fire, Materialki control materials such as metal and glass, and Corporalki manipulate people’s bodies. Ravka's Second Army is led by General Kirigan, who has spent his life searching for a Grisha who can summon light; the only person who could destroy the Shadow Fold—a region of impenetrable darkness, created hundreds of years ago. Since then, Ravka has been at war, and is now on the brink of splitting in two as the west seeks independence.