Gyeonseong creature takes us back to one of the hardest and struggling phase of Korean history and mixed it with an appealing sci-fi plot and created a perfect recipe for mass entertainment. ( Read summary for plot you will get the basic idea) From cinematography to cast everything is well thought and I am sure it was something that people who are sucker for some more 'stranger things' and 'sweet home' would like to watch.
First episode started with a bang especially the opening that already set the tone for the drama and you will find yourself at the edge of your seat from the suspense and the horrifying things that the army was doing to create their biological weapons and the tension between the two countries and then we are introduced to our main leads. FL: Cold, bold and have a mysterious aura. ML- Typical perfect, rich, know it all character but obviously with a difficult past. I love both of them however the more I loved their scenes separately I did not find myself feeling any chemistry between them whenever they were together. Even in the first meeting, that chemistry building looked very forced ( some people might not agree with me). That slow motion scene just took me out of a perfect action moment that was going so well. ( very typical Kdrama scene). I do not know why but ML is one of my favourite actors but here I just couldn't feel anything for his character same goes for FL. Like I really couldn't connect with his or her character throughout. I had nothing to watch so I continued watching it. I don't think this show needed romance arc but it garners more audience with that subject matter so why not... anyways that is just my opinion. The creature created good suspense in the beginning but the moment they showed it...it wasn't really that much frightening tbh. The mother and daughter arc was really good though and I really enjoyed the performance of all the side characters . And they could have explored their characters a lot more but they remained just side characters. There will be a second season and it remains to be seen how it will turn out. Overall it was a good drama no doubt but predictable after some time. Not much for a re-watch but yes definitely a one time watch for sure.