The end has come, the world has plunged into eternal night, and humans are struggling to survive in the wasteland. Yan Jin, a taciturn underground city master, controls the last batch of resources and survivors, but he does not know that he was a prophet on the eve of disaster. It wasn't until Li Xiao, the hostile hunter who was imprisoned in the dungeon by his own hands, lifted his mask that Yan Jin was shocked to realize that Li Xiao was the "other self" he had copied in the laboratory seven years ago. The fragments of memory are like knives, and the truth tears apart the soul - they are one, but they are prisoners of each other due to fear. Now, the core code of the doomsday is hidden in each other's blood.
