'Seolae' in 'Mondogane' has secretly lived among humans as a vampire for a long time, but one day, she learns from a doctor that she does not have much time left to live. Because she has a young daughter, Seolae must find a way to treat her illness. When she obtains a large sum of money and is able to receive treatment, her past connections are revealed, along with the maternal love at the heart of this film.