This drama was fully pre-produced before airing which is a departure from the live-shoot production format that characterizes most Korean dramas.
UN peacekeeping troops are dispatched to the war-torn country of Uruk (fictional Eastern European country). Captain Yoo Shi Jin (Song Joong Ki) is the team leader of the Special Warfare Command unit, meets Kang Mo Yun (Song Hye Kyo),a volunteer doctor with Doctors Without Borders. As they work alongsideeach other in disaster- and disease-stricken zones, Shi Jn and Mo Yun clash then fall in love.