There's at least one requirement for a villain to be good at his villain's job : it's to be a clever villain - or at the very least - a villain smart enough to give the good guy a run for his money. So when a villain cut clean the breaks wire from a car (in a foolish attempt to make the car 'accident' that results to pass as a suicide), that already tells you a lot about the smarts of the said villain. But when this one CONVENIENTLY drops something personal that he had bring with himself (oO') when he's trying to murder someone with a knife (--')... in a police station (><') ... then I have only one last advice for him :
Please stop being a villain.
Seriously, drop it (lame pun intented). Try sewing. Or anything else. Honestly.
And that already resumes part of the show : with these few mistakes that happened quite early in the 1st episodes, there's not so much for the actors to save the drama from its shortcomings. But somehow, that's exactly where the few merits of this drama can be found. Midway, you end up more interested by the relationships between the characters than the story by itself, the issue being that without a stronger setting to backup these relations, it's quite a challenge to keep up the viewers interest. Still, on its way to the ending, there's some valuable twists and scripts progress that could satisfy anyone not expecting too much from this show, as long as the characters don't make you cringe.
But I still think you should reserved this show for a moment you really have nothing more enjoyable to watch.