Kwon So-hyun

A working class family move into a new condo purchased after 11 years of hard work. They throw a housewarming party to show his co-workers when overnight a heavy downpour creates an extremely deep sinkhole that engulfs the entire building.

A woman's past as a convict follows her everywhere and because of this she doesn't open up to others. But then she strikes up a friendship with a broken child who has suffered from domestic violence and decides to save the girl from the cruel world. A man who holds feelings for the woman, tries to protect her in his own way.