I just finished the serie and i'm impressed how good it was, always waiting for the episodes to come out every wednesday and thursday.

SPOILER!!

The serie is really entertaining having Lee Do Hyun as the main character Kang-Ho, him being a prosecutor but after trying to find out who killed his father, he was followed by Song Woo Byeok and Oh Tae Soo.
The serie itself i can only say it's a masterpiece and it deserves being watched.
I'll guarantee if you want to watch it, you won't regret it.