Three months before the year 2020 ends, the undead rose up and invaded the world.
In just a few weeks since the virus spread out and caused the apocalypse, many countries found themselves in an unimaginably horrendous crisis. Destruction has scattered everywhere as the war against these ravening monsters broke out.
Fortunately, the government managed to secure a number of safe locations and evacuation centers. However, an aircraft is usually a requirement for people to reach these destinations.
These places are considered safe and secured mainly because they are isolated and far from the current sites of the infection. With that distance, the authority had enough time to prepare everything before swarms of zombies could stumble upon them and attack.