The 10th Volume of The history book of Goryeo (Goryeosa). Iron forge village abandoned by The nation defeated the strongest army in the world, The Mongols. Iron forge village is full of refugees, weapons and iron. In front of the village, there’s ‘Mongke’, The Mongolian General, and hundreds of Mongol Army who follow him to destroy The Iron forge village. A daredevil from the Iron forge village ‘Ji Gwi’ and a cold young general ‘Oh Sa Hwa’. The two completely different people, from their status to personality. They must unite their strengths to stop The Mongols, but every single thing is conflictive. In the end, will Dain Iron forge be safe from The Mongols invasion? Also, can Ji Gwi and Oh Sa Hwa defeat the brutal Mongols?