The main character hates his neighbor woman, the owner of a noisy dog.

Then three months after she disappeared, he finds the body in an officetel basement.

Early the next morning he saw a missing neighbor standing up looking up at his window, and from that day on he could not escape the nightmare.

People who live in a communal residential space in the city living without asking or answering each other, as if they respect the territory of individuals. 

Are they having a common nightmare in this place where they hit the wall as a "boundary" and live "on alert" to see if someone's invading them?

- JUNG Ji-hyun