In an accident, a 10-year-old genius boy caldwell leng accompanied the meteorite to the fantasy world. In there, he lived with the dwarves who were good at forging. Together with the amazing ability, he practiced hard and grew rapidly. Not only did he learn the incomparable smelting and forging techniques of the dwarves, but also spontaneously created new martial arts. When everything developed peacefully, the cruelty came with the desire of others, too.