This drama is one of the best dramas I've ever watched. Everything in it is new and not expected at all from the first episode. The acting, story, and the culprit are insane!! Really recommend it if you're interested. This drama differs from any action drama I've watched. The feeling To be suspected from your nearest friend, sanity, and everything is interesting. The main story might be similar to other shows, but the story line is different as well as the unexpected events and the well made scenes make you feel that the culprit is someone, but in the end it happened to be someone else.