Fuyuki Minamoto, a genius and the overlord of the realm was plotted against, backstabbed, and murdered by the ones he considered his closest. 300 years later when he reincarnated back in the world with his memories in the body of an 8-year-old child, Fuyuki, he comes to know that everything he developed and made was now considered third-rate and trash as the martial arts around the world had improved a lot. Making his way through struggles and setbacks, will Fuyuki ever be able to become what he used to be?