Special Warfare Guard Captain Yoo Shi-jin (Song Joong-ki) and Sergeant Seo Dayong (Jin Goo) encountered a fierce fight while on vacation. When they sent the thief to the hospital, they were misunderstood by Chief Physician Kang Mo-yeon (Song Hye-kyo), which also caused Seo Dayong's ex-girlfriend Yoon Myung-joo (Kim Ji-won) to suddenly appear. Kang Mo-yeon thus became acquainted with Yoo Shi-jin, but they eventually parted ways unhappily due to different positions. An unexpected dispatch, Kang Mo-yeon met Yoo Shi-jin again in Uruk, where the war was frequent. As the captain of the overseas medical dispatch team, Kang Mo-yeon and Yoo Shi-jin fought side by side countless times, and their feelings were sublimated. However, after returning home, Kang Mo-yeon began a new round of worries about Yoo Shi-jin's life-and-death work. At the same time, Seo Dayong and Yoon Myung-joo's love was once again threatened. "Descendants of the Sun" is a Mizuki mini-series broadcast by KBS TV in South Korea from February 24, 2016. This drama is the first Korean drama broadcast simultaneously in China and South Korea.