A Bedsore.

Chang-sik, a retired man, lives with his wife, Gilsoon and her caretaker, Soo-ok, an illegal immigrant. One day, a bedsore develops on Gilsoon, which does not seem to heal. Even though Gilsoon is in poor shape, Soo-ok insists on taking time off on weekends. Chang-sik realizes Soo-ok is trying a sham marriage for a new visa. Upon hearing this, Chang-sik suggests they get married.