He proves to her that he is a soldier with the help of army doctor Yoon Myeong-joo (Kim Ji-won). Mo-yeon mistakenly assumes Si-jin is part of thief's criminal gang. Kang Mo-yeon (Song Hye-kyo) for the first time. Dae-young realizes his cellphone was stolen by the thief and goes to the hospital to retrieve his cellphone. The thief is injured during his capture and is sent to the hospital. He catches a motorcycle thief Kim Gi Beom (Kim Min Seok) with Sergeant Major Seo Dae-young (Jin Goo).
Yoo Si-jin (Song Joong-ki) is the captain of a South Korean Special Forces unit.
