Question: Which actress in the 2004 South Korean film about a police detective who investigates a murder case while struggling to hang onto his relationships with his wife and mistress, committed suicide?
Sentence (from "The Scarlet Letter (2004 film)"): It is the second film by "La Femis"-graduate and academic Byun Hyuk (Daniel H. Byun), and starred Han Suk-kyu, Lee Eun-ju, Sung Hyun-ah and Uhm Ji-won.
Relevant evidence: Yes