Sinkhole plot
"A house earned after 11 years of effort falls deep into the ground in a minute."
The average citizen Dong-won and his family move into a house he bought after years of hard work. Overjoyed, he invites his colleagues to a housewarming party, but the heavy rainfall the night before creates a gigantic hole in the ground, which swallows the entire house and the people in it in no time. Hundreds of meters deep in the hole, Dong-won, his neighbor Man-su and the unfortunate guests have to find a way out. It starts to rain, the rain fills the hole with water and they are running out of time.