The end of the world is coming, and zombies are rampant. Su Xi, a scientist whose blood can suppress viruses but suffers from empathy, is forced to go with the ruthless mercenary Lu Jin, codenamed "Ash", to the Ark, the last fortress of mankind. Along the way, it is not only zombies that are deadly, but also "spiritually infected bodies" that can detonate inner trauma. She is the only light, but it cannot illuminate the sins she carries; he is the strongest blade, but it cannot cut through the nightmares of the past. When the truth about "Ark" was revealed, they pointed their guns at their hypocritical compatriots. On the ruins of a completely collapsed civilization, two broken souls decided not to seek shelter, but to ignite a faint ray of new dawn with their own hands.
