==**Praise the writting, praise the acting, praise the director, praise edition and everyone on the sound mixing, edition and OST!**==
I could give this a 100 if I could, I'm not exagerating at all, this was a top notch writting and acting, probably my favorite thriller drama of all time. The cast did excellent but Shin Hakyun was out of this world, I've never seen a male actor embodying a character on a kdrama as well as he did here and finally Choi Daehoon is getting the praising he deserved for a long time. The only think I can ask for is a special episode with [spoiler]Hyeok's backstory, he was the connection between characters on so many scenes and he nailed every one of his lines and they were long af, almost a monologue, but that would never happen so.[/spoiler]
Just watch it, this is the best drama of this year and it will be hard to top!