An earth-shattering biological experiment accident tore apart the tranquility of the city. Out-of-control experimental subjects poured out like a tide, and the once prosperous city instantly turned into a flesh and blood mill. Vine-like "Stranglers" wrap around skyscrapers and devour living creatures, slime-covered "Scavenger Swarms" can eat up a cow in ten minutes, and invisible "Void Hunters" turn shadows into hunting grounds.
The entire city was blocked by a 50-meter-high alloy wall and power grid. The government dropped the "epidemic quarantine" notice and then disappeared. Supermarket shelves have long been empty, hospital blood banks have clotted, and survivors are killing each other over half-filled bottles of mineral water.
Lin Feng, a former member of the special forces, lost his teammates in the explosion, but rescued Su Qing, a biologist carrying experimental data, in the rubble. When they discovered that these creatures were undergoing secondary mutations, and there was a strange sound of mechanical operation from the other end of the separation wall, they realized that the real cage might be more desperate than the out-of-control monsters.
