'Gap Dong' Sung Dong Il shared his thoughts on starring in the drama. In the press release of the cable channel tvN's new drama "Gap Dong," which took place in the CGV Yoong San in Seoul in April 8, 2014, producer Jo Soo Won, scriptwriter Kwon Eun Mi, and actors such as Yoon Sang Hyun, Kim Min Jung, Sung Dong Il, Lee Joon, and Kim Ji Won made their appearances.

In the drama, Sung Dong Il plays the detective Yang Chul Gon. He is a friend of detective Ha Moo Yeom, and also the one who disagrees with him all the time. He said in an interview, "Please forget the comical scenes I had from the drama Reply 1994." He added, "I am sure that Gap Dong is going to be as popular as Reply 1994."

The cable channel tvN's new drama "Gap Dong" is a mystery thriller based on the serial murders that happen in the city of Il Tan. It tells a story of a detective Ha Moo Yeom who tracks down the suspect named Gap Dong. The cable channel tvN's new drama "Gap Dong" will premiere on April 11, 2014.