An Jung Geun is a fighter for the Korean independence movement. Seol Hee used to be a court lady for Queen Myeongseong, but, after Queen Myseongseong was assassinated by the Japanese, Seol Hee takes part in Korean independence activity. She becomes a geisha and gains the favor Ito Hirobumi, who is the Japanese Resident-General of Korea. He travels to Manchuria and Seol Hee accompanies him. Korean independence fighter An Jung Geun learns of Ito Hirobumi's travel plans from Seoul Hee. An Jung Geun decides to assassinate Hirobumi Ito for the Korean independence movement.
(Source: AsianWiki)
