Liu Qi, a young man from the 21st century, traveled to the future and became a new Manhattan police detective. This city uses pain as its energy source - the upper levels use "manna" to maintain immortality, while the lower levels are reduced to fuel in despair. Liu Qi discovered that he was actually an "atavistic person" who could directly absorb pain, and the legacy of Wang Tiguang, a philosopher of the light energy tribe, was sleeping in his body. In order to protect him, his lover Lin Wei was willing to become a living filter and imprisoned in the Tower of Eden. When the seventy-two-hour countdown starts, Liu Qi must make the ultimate choice between "sacrifice his lover to reset the world", "escape home" and "save in his own way". This is a desperate battle between human nature and genetic instinct, and it is also a lonely epic of a traveler looking for a way home in a different world.
