A young blacksmith name Hanma is leading a boring life. Having a blacksmith shop outside the city isn't very adventurous. One day when the mine where the village gathers its ore is turned into a dungeon, Hanma gets recruited as a personal blacksmith for the party which is supposed to conquer it. Will he be alright? Will he overcome is hate and fear of dungeons? This is the day his life starts to become one big adventure!