One of the best action kdrama! It was great, perfect direction, incredible sets, perfect story, the actors were very good and everything was10/10! I wish it had more episodes. It was all great and deserves great ratings! I think all the actors played their roles perfectly! Woo bin was perfect in the role of 5-8, Yoo Seok was perfect in the role of Sa Wol and Yi Dam in the role of 4-1(those 3 was my fav).I can't imagine anyone other than Woo Bin in the role of 5-8 he was perfect for this role ❤️.