Cheng Ye, a college student, died tragically after struggling in the wasteland of a nuclear war for five years. He was reborn one year before the disaster with his unforgettable memories. Incarnated as a "prophet", he tried his best to persuade his father (a national energy expert) and senior officials to launch a secret plan to build a refuge "Kunlun" in order to reverse the destiny of mankind.
However, the devastating "big collapse" still came. In the crisis-ridden underground fortress, Cheng Ye faced a lack of resources, turmoil in the hearts of the people, and was even besieged by terrifying mutant creatures controlled by the mysterious organization "New Era". An operation deep into a radioactive uranium mine revealed the shocking conspiracy of the "New Era" to actively promote nuclear war and attempt to control human evolution, and discovered that companion Li Xiaoyu was actually the ancient "biological key" connecting the core of the planet.
In order to activate the planet's purification process and temporarily neutralize global radiation, Li Xiaoyu sacrificed herself. This move revealed the truth of the universe: the periodic "Violet Arm" interstellar cloud caused drastic changes, the "Watcher" civilization guided life through the disaster, and the "New Era" and the corrupt forces behind it attempted to control the disaster.
The cleansing light reshapes the timeline. Cheng Ye was reborn for the third time with the complete memories of his two lives. This time, his father knew in advance and the "Tinder" power gathered; more importantly, Li Xiaoyu also returned with memory fragments. Armed with information that changes everything, Cheng Ye and Li Xiaoyu are determined to crush the "New Era", integrate human power, face the "sifting" of the universe head-on, and start the ultimate battle to reverse fate.
