The story takes place in Seoul, 2011. Lee Yoon-sung is a talented MIT-graduate who's working on the international communications team at the Blue House. He encounters dangerous situations while solving a variety of cases, both big and small, for people who need his help, and eventually becomes a "city hunter."

This drama portrays the turbulent life of Lee Mi Reuk, a Korean expatriate who fought for the freedom of his country while studying medicine in Tokyo, during the period when Korea was under Japanese colonial rule. He fled to China and eventually settled in Germany.

Set in the 70's, it shows the eternal love of a woman for her deceased husband.