From the year 3021, the infectious virus on the earth's surface has spread to the sky residential areas, and one after another areas have been infected with the virus. Everyone has become unconscious zombies, but they are still doing what they should do.
At first, it could be controlled with serum, but later, as the virus became stronger and stronger, the effect of the serum gradually weakened.
In order to eliminate zombies, humans began a genetic experiment to fuse zombie DNA with human DNA and import it into the human body. The code name for this experiment is - "Human Angel Project!"
Due to different vaccination personnel, each person's ability after vaccination is different. But the experiment has a shortcoming, the success rate is only 15%.