Jong-hwan
Ah-young, a grown orphan with government aid cut off, starts working as a nanny for Young-chae, a single mother who works at a bar to make ends meet.
Kyung
In a world devastated by a fine dust pollution, society has been divided into two castes: the "Cs" (Clean) are those who can afford a vaccine at birth which permits a 100-year lifespan and the "Ns" (Non-clean) are those who can't and will usually die by the time they are 30. Two young women who share the same tragic fate take comfort in each other's company.
