It is extremely rare for female North Korean refuges to come straight to the Republic of Korea. They must arrange it through Chinese brokers and other third parties. Unfortunately, every time they cross the border into another country they are exchanged as currency. They are appraised based on their age, looks, and physical use. In worse cases, they live as sex slaves to be exploited. I expressed fish in a fish tank about to be sold at any moment as a metaphor for the miserable lives and sorrows of these women.