Amidst the ruins of hundreds of buildings, a unique dome-like building still stood tall. Countless corpses were seen around it, and aside from those motionless bodies, there were hundreds of creatures moving around, but they couldn't be classified as humans at all. Humans had brains to think, they usually did activities and spoke in their language, but those creatures were just randomly roaming around the area while communicating in an unknown language. No humans could communicate with them because they were zombies.
It was those zombies that destroyed the entire District 4. Most of its residents died, while some of them became zombies after being bitten. A few lucky ones were evacuated to District 1, but it was clear that no lucky humans remained in the area because zombies had taken over the place.
However, even if those zombies had full control over District 4, they somehow didn't approach the dome-like building. That was because the building was the infamous White Dome.
