Humanity faced a catastrophic disaster. Mutated Ebola virus altered body composition, turning people into blood-thirsty zombies. Hordes of living dead spread around looking for food. Small survivor groups hide in basements and military vaults. A few days ago a talented microbiologist made a broadcast over common radio frequencies. He made a breakthrough in his research. He made a vaccine. But then his vault stopped responding. Nearby bunker “South” sent a team to find out what happened. But their main objective is to find the vaccine.