The actor Kim Ha Neul (Female Lead) was completely expression less and like why was she there?????. The Plot didn't had any weight and it was just dragged for 16 episodes.
A Husband (great actor and did some justice to the role), expressionless and bad actor (female lead) entangled in a murder mystery which makes it a chain of murders. Then romance, love triangle, politics, Office hierarchy, corruption and what not. Complete melodrama and that too boring on top of it.
The change in actors, Director and producer would have done some change, but judging by cartoons who made this project, it is a lost cause.
My personal thinking and not imposing on others.