It's not necessary to have lots of action to make a movie a thriller, even though the genre is action-thriller. Before watching, expected lots of action. Even though not many action or fight scene was not involved, the movie made enormous tension throughout. The plot showed, the diplomatic, humanistic points and its clashes. How much trauma can make someone stuck in past is well depicted here. How a small personal debate and reporting can provoke someone or something or some group and what outcome it can bring, is also well depicted. How much courage it takes to go through a negotiation table and how to manage the tension throughout the negotiation is portrayed very cleverly.