Doomsday Swan Song

The instantaneous radiation from cosmic rays wiped out human civilization and turned 99% of life into deformed zombies. This land is divided into two cruel forms: during the day, it is the violent roar of millions of zombies under the light; at night, it is the silent choking hidden in the dead city. The rules of ordinary life have failed. Only a handful of survivors carrying special genes can struggle to survive in the era of destruction born under the wave of radiation. But what can the existence of a few people bring to this desperate wasteland?