In the mysterious and magnificent world of demons and spirits, and the mysterious and infinite Book of Time and Space Demons and Spirits, 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? There are also brothers who share weal and woe, and together they practice the strongest skills and the strongest demon spirit power, and step into the peak of martial arts.