The story Sofia refers to is that of the Greek myth of Sisyphus. In the story, the Greek god Hades punishes Sisyphus by forcing him to roll a large boulder up a hill and let it roll back down before rolling it up again, over and over for eternity. This mirrors how both Uno and Sofia feel—that they work hard but never benefit from their efforts. They feel that their race and poverty limits them, and they don’t see any opportunity to advance or progress.