// Descendant Of The Sun DT#2 \\

Yoo Si-jin (Song Joong-ki) is the captain of a South Korean Special Forces unit. He catches a motorcycle thief, Kim Gi-beom (Kim Min-seok), with Sergeant Major Seo Dae-young (Jin Goo). The thief is injured during his capture and therefore sent to the hospital. Dae-young realizes his cellphone was stolen by the thief and goes to the hospital along with Si-jin to retrieve his cellphone.

In the emergency room, Si-jin meets Dr. Kang Mo-yeon (Song Hye-kyo) for the first time, and is instantly attracted to her. Mo-yeon mistakenly assumes Si-jin is part of the thief's criminal gang, due to his nickname "Big Boss", which is actually his call sign. He proves to her that he is a soldier with the help of army surgeon Yoon Myeong-ju (Kim Ji-won).

Si-jin and Mo-yeon begin to date, but due to their jobs, their dates are often interrupted halfway. Si-jin receives orders to lead his soldiers on a peacekeeping mission in the fictional country of Urk. Meanwhile, Mo-yeon is upset because she failed to become a professor due to a colleague's privileged background. When Si-jin and Mo-yeon meet again, they talk about their views on life and realize how different they are. Si-jin, as a soldier, kills to protect lives while Mo-yeon, as a doctor, honors the Hippocratic Oath and tries to save lives. Due to this difference in viewpoints on life, they agree to part ways. Dae-young, on the other hand, faces a dilemma on whether to continue with his relationship with Myeong-ju or risk being removed from the army by Myeong-ju's father.

Eight months later, Mo-yeon rebuffs the sexual advances of the hospital director and as a result is assigned to lead a medical team to Urk. There, Si-jin and Mo-yeon meet again. Through their encounters in Urk"an earthquake and an epidemic"their love for each other grows stronger. While in Urk, Mo-yeon accidentally confesses her feelings (much to the amusement of their respective teams) and the two officially start dating.

Back in Korea, the two of them continue their dates until Si-jin and Dae-young are sent on an operation in which they disappear and are assumed to be dead. Months pass, and Mo-yeon mourns his death, deciding to commemorate his passing with a volunteer trip to Albania. This is where Si-jin eventually finds her after he and Dae-young are rescued from captivity by "a friend from afar", a soldier from North Korea whom Si-jin had helped save earlier. Si-jin and Mo-yeon along with Myeong-ju and Dae-young are all happily reunited with each other.