The characters and setting are introduced through both the present as well as 20 years ago and some parallels are drawn from that,every person in this drama behaves shady which makes the suspense go through the roof and combined with the great OST makes the show very captivating to say the least.The two 2 mains leads are great especially Shin Ha Kyun which is my first time seeing him,he gives of that Joker,Hannibal vibe which is very hard to pull of without seaming fake,the supporting actors also do an awesome job with a few of them being shockingly good at hiding their true motives,easily the best drama in the first half of 2021 in my opinion.