​Heroes of Gauri, Conquer Another World! The most glorious name in this land, Gauri.​The one who protected that name. People call him the Steel Emperor!​The last Great General of the fallen Gauri (Goguryeo), “Go Jincheon.” At the moment of their fall, he and his elite unit, the 'Black-Armored Demon Cavalry', fall into another world.​A strange land where various races such as Elves, Orcs, Dwarves, and Wizards live.​If they cannot return There is no choice but to establish a new Gauri. Go Jincheon raises his banner once more for the conquest of the continent.