Cha Ji-Won is a UDT officer of the Navy Special Operations Force. He is positive and has personal charm, but he falls into a desperate situation due to a friend's betrayal. He goes through numerous life or death situations. Cha Ji-Won then enters into a fake marriage with Swan to hide his identity. Through the bright persona of Swan, Cha Ji-Won falls in love and regains his trust of others.

Lee Jin-wook, Moon Chae-won, Kim Kang-woo, Song Jae-rim, Yoo In-young, Jeon Kuk-hwan, Choi Jung-woo, Lee Won-jong, Jung Dong-hwan, Lim Se-mi, Kim Tae-woo