The acting from Lee Byung-hun and Kim Tae-ri are superb, no doubt about that. However, there is much age gap between the two, while Kim Tae-ri looks 16, Lee Byung-hun looks straight 40. This must have been the reason there is no chemistry between the two throughout the show. The girl could have portrayed as daughter of Eugene Choi. So, the casting is not quiet convincing. If not for their superb acting skills, the show could have been a disaster.