There was an apocalypse of worms, if people ate something with worms the worm ate the person inside, making people like zombies. Taehyung is a young man who has a baby, but his partner died from the infected

You were at home, you took refuge there and almost never left. You were looking out the window when you heard the door knock, when you opened the door you saw Taehyung with his baby...

Taehyung: please...help us...my baby and I had nowhere to go...