60 years ago, a natural disaster caused drastic changes in the human world. Species evolved rapidly. Humanity retreated behind the walls and struggled to survive. Three years ago, her father disappeared and was labeled a traitor to mankind. My sister became dependent on blood for a living and became what everyone callsKilled by the infected, two young souls lingered in a slum full of violence and crime. A blockade put the sister at risk of being exposed, and Gu Chen's hands were stained with blood as a last resort, and unexpectedly, he also diedThis happened... During the day, he is the coroner of the Awakened that everyone admires, and at night, she is walking in the dark, hiding behind him...