Explorer Across the World

Luo Meng came to this world and fell into a dilemma. In order to save his life, he chose to investigate the case. As a series of strange things happened, he realized that he did not investigate the case after traveling through time, but because he wanted to investigate the case. So what is the real reason that prompted him to travel through time? What is the real purpose? Are they enemies, relatives, lovers, or acquaintances from the original world? Or is it the bond between time and space?