A Survivor City in a Zombie War

The government and the Geoseong Group detect abnormal signs in various parts of the world.

The Geoseong Group prepares a medicine that lengthens the zombie virus’s incubation period, and the South Korean government secretly seals off Daesan City to prevent the spread of zombies.

However, the virus falls with the rain, and zombies from China cross the sea on foot and land on the Korean Peninsula.

Daesan City, the first city to be sealed off, instead fends off the zombies’ attacks and becomes the world’s only safe city.