Apocalypse Zombie 2213

After the spread of the terrible virus, humanity was divided into humans and zombies. To protect themselves, the survivors went underground and built cities with life support systems. Meanwhile, the surface of the Earth is dominated and ruled by raging zombies . But people do not give up and have been trying, for decades, to develop a vaccine against zombies, in hope of leaving the bunkers. And then one day, from the underground laboratory of Professor Joule, a signal was received that the final experiment was successful and the vaccine, which turns the zombies back into people, is found. There was hope for salvation. (The underground world rejoiced and celebrated the victory), but suddenly the connection with the professor was lost...