I missed Lee Jong Suk and he came back and prove to us once again why he is one of the best Korean actors out there. I feel sorry for those who haven't discovered Drama as yet and these amazing, talented actors. Hollywood actors cannot come close to these people talents. With this said I was not disappointed at all, I was hooked from the first episode up to the last. The ending was satisfying but heartbreaking. I have watched thriller dramas before and sometimes you keep asking yourself how longer should the good guy suffer? The worse ones are those that the antagonist is defeated in the last 10 minutes of the last episode. However, this was satisfaction through and through. This was definitely a thriller indeed. I normally go for the romance dramas but this was really refreshing and immensely good. Yoona- she really made me happy, her acting was superb, I watched her in K2 and I was not impressed, not with her acting but the chemistry between she and Chang Wook wasn't that great but Big Mouth, amazing!!!! She was fierce and I loved that about her character. As for the other actors honorary mention Kwak Dong Yeon I am so excited for his career lifting off as he has been a minor character for so long and now he's finally getting the recognition he deserves. I must also add that Kim Joo Hun did an amazing job as well, after seeing him as a sweet softy, him taking on this role of a mysterious Mayor was quite thrilling. I loved all of Chango's squad especially the one's who were by his side in the end. I just really loved this drama and this is the first drama from year alongside My Beloved Summer that I could not find anything that was a huge flaw and I can state that they are basically perfection. Please watch it. You might shed a few tears but they are definitely worth shedding. Lee Jong Suk and Yoona fighting!!