Sung Chang-hoon

After much trials and tribulations, a man marries his first love. But when she gets pregnant, they find out that she has cancer.

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."