Traveling through time and space is a very popular activity nowadays, and the destinations traveled are mostly complete worlds evolved from stories created by various creatures. The time traveler rewrote the fate of the original character for various reasons, making the work that the original author worked so hard to create a mess. The authors saw their works changed beyond recognition, but were unable to change them, so they finally jointly sought help from the Space and Time Bureau. The travelers are required to return to their own world and set the story line back to its original position. The Space and Time Bureau then dispatched employees to complete tasks in various worlds, expel outsiders, and set back the storyline.
And Lu Mo is one of the employees...