This kind of story is a common trope in a lot of drama plots, if done correctly it can be amazing. Whats lacking in this one is not the acting as such, but the amount of plot holes in the actual scenes. Not only that, but there is a lack of suspense built up into each episode, as well as poor timing in the character development, and a lack development for the most part. Some scenes pointless, andthere is too many breadcrumbs, making the motive so predictable. The way the characters themselves are portayed often mirrors the excessiveness of japanese dramas. Rather than wasting your time on this, watch Kill It or A Smile Has Left From Your Eyes. Those two were much better.