Twelve years ago, as the U-20 virus spread around the world, the whole world was in an uproar. However, due to the appearance of zombies infected with the virus, Hee-won is bitten instead by zombies that wer...

In the year 2020, it was found out that a harmful virus had infected the human race, killing them slowly and bringing them towards a dark future. But with the technology they had in hand, in an attempt to sa...