When meteorites brought alien viruses and Zerg, humans used nuclear bombs to sound the death knell of evolution.
Infected people, parasites, and ordinary people are facing each other in the wasteland, and the deadliest enemies have already taken on the guise of compatriots.
A man who was infected with the virus but insisted on his humanity was gradually transformed into a public enemy by the human traitors of the "fusion faction" on the road against the Zerg.
This is a war about survival, and it is the ultimate torture of "what is human" - when the hero is turned into a monster by lies, and the monster is stealing civilization as a savior, who should you shoot?