This is was a slow watch for me... this is a like "Mission Impossible" drama but with subtle hint of comedy. It was borderline hitting the "what?!" - because it portrayed the mission serious and then the comedy kicks in and it is like -- what kind of drama is this and somehow it does not really mix and did not blend well. The acting of Park Hae Jin and Park Sung Woong was great, I think this is more of a plot issue. They wanted to make the serious agent have a comedian side which did not really blended well (not because of the acting) more of what are they trying to present in the drama. What made it harder to watch is the leading lady Kim Min Jung - there is just something about her that is annoying like Choi Kang Hee (that's why I could not finish the Queen of Mystery). This is just a matter of personal preference.