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."
Lee Yoon Sung is a talented MIT-graduate who works on the international communications team in the Blue House. He plans revenge on five politicians who caused his father's death with his surrogate father Lee Jin Pyo and eventually becomes a "City Hunter".