The Rebirth of the King Grey, the most powerful and bloodthirsty king in the world, dies suddenly in his mid-30's of no apparent cause. Floating in the abyss, a voice urges him to seek out the light. He suddenly awakens in an alternate world as newborn Arthur Leywin, first son of retired adventurers Reynolds and Alice. At first he is furious to be reduced to a helpless infant, but he soon discovers humans in this world use an unfamiliar power called magic. Determined to protect himself by gaining as much power as possible Arthur takes any opportunity he can to learn, reading his parents books in secret. He discovers his new home is the continent of Dicathen which contains three kingdoms; Sapin the nation of the humans, Darv the underground nation of the Dwarves and Elenoir the forest nation of the Elves. Having been a master of Ki in his old world Arthur practices magic at every opportunity and casts his first spell at only two years old, injuring Reynolds and destroying their house. Having never experienced family in his former life he is confused at the feelings of guilt and realizes he has learned to love his parents and cries for the first time in either of his two lives.