i thought that this drama was all about killing and spy and action so i didnt watch it but one of my friend told me to watch just the first episode and see if i like it i watched it and i was so suprised by how good it was this drama was so good i do highly recommend watching it and i really like the actors ji chang wook and yoona their acting is so good yoona was so into the character i give this drama a 10 on everything i cant really describe how good it is i really ship ji chang wook and yoona
you can watch it on kissasian, ondramanice, dramacool and alot other websites.