You earn as much as you work, and you live off that money. This simple proposition has always been a problem for Jung-cheol. At the soybean paste factory he went to work for in the bitter winter, he dreams of travelling to warm Philippines in spring - as long as he survives the winter making his portion of the soybean paste that he promised the boss. But the more he struggles to live, the worse it gets. And soon, the fermentation room turns musty with the black mold spreading from the thousands of ferment boiled soybean lumps.
Se-jin, a high school student, becomes pregnant and gets ostracized by her family and school. While wandering the streets, she meets Joo-yeong, an experienced runaway, and tries to get an abortion with Joo-yeong's help.
