"apparently they've been hiding in here for months and survive by eating what's on the store, mostly consist of snacks, instant ramen, and mineral waters."

It's been 2 months since the zombie apocalypse has broken out in South Korea and Seoul has been left and abandoned by people to be occupied by zombies. The new government in Busan sends a special force led by Commander Kim and Captain Bang to "clean up" the city. But they're so surprised to find survivors in the dead city: 2 college students alive and completely human, inside a convenient store.