In the final days of Goguryeo, commander Go Jincheon leads the elite Black-Armored Ghost Cavalry on one last mission—only for a storm to cast them into a continent of elves, orcs, dwarves and magic. With no road home and no nation left to return to, Jincheon chooses to rebuild what history took from them. Using Goguryeo discipline, cavalry tactics and ruthless statecraft, the stranded soldiers carve out a new Gauri, drawing kingdoms and empires into wars that will decide whether their lost homeland can be born again in another world.