In the mysterious and magnificent world of demons and spirits, and the mysterious and infinite book of demons and spirits in time and space, Nie Li is pursuing the truth of the world. How should he choose between the beautiful and gentle Ye Ziyun and the stubborn and proud Xiao Ning'er, who are favored by two goddesses? And with brothers who share weal and woe, together they practice the strongest skills and the strongest demon power, and step into the peak of martial arts. I, Nie Li, must become the strongest demon master!