In AD 3030, genetic war destroyed the old civilization, and chaebols, aliens, and out-of-control mechanical gods carved up the wasteland. As a "quick save" messenger of time and space, Lu Xiuyuan can pause time and return to the save point he set after death.
In order to find his dependent sister Lu Qiulan, who had been missing for four years, he broke into the city of sin, but was involved in the bloody chess game between Shennong Heavy Industry, the Ao family and the perverted gang. Others only have one life, but he can turn every failure into intelligence.
Since the ending is not perfect, then read the file and start over, until the evildoers are killed and the old friends return, and all the people who deserve to survive will be spared.