Talk about a convoluted plot, if you haven't seen or just planning to see it, I'd say don't.

Let me start by saying that it pains me to give this a low mark. First, i am in love with Kang Joon and i almost always give his dramas a pass. Second, i am at awe that Korea tries new and high-concept dramas and are not afraid to experiment - but this experiment didn't just fall flat on its face, it broke the floor and went through so deep i cant even fathom where it went.

To put it mildly, no matter how senseless the plot is, the first 7 to 8 episodes were at least interesting - i loved Kim Sae Ha and his undercover vendetta, I loved Jung Sae Byeok as a zealous and capable police officer. However, by the time we were on the episode 9, things got muddy. The last episode is a complete jaw dropper in its absurdity that when the credits rolled you will be in disbelief.

Things to note:
1. A woman from the future created the grid to protect the earth from extreme solar radiation. What did they do? Of course, try to catch her like she's a suspect. Put her in a lab and poke at her just because its fun. Why? Aren't the people in the know, supposed to be thankful to her for saving the planet?
2. The time travelling bit is just a hit and miss, and follows absolutely no rule at all. In episode 7 and 8 Sae Ha's journey to the timeline cannot be explained in paper but i still liked it up to that part. Their mantra is time doesn't flow, and so the sense it seems.
3. Did they imply Sae Byeok was raped by Ma Nok? When and how did that happen? Was Ma Nok related to Eo Jin? How did the Ghost became related to both of them?
4. The last episode is one big mess i don't even know what to make of it. If they intended to make it a cliffhanger for a possible new season then it just didn't work. They just stacked one mess after another and expected people to be puzzled and amazed.. After slapping the faces of the few who watched this season did you really expect us to come back for more? Sorry just no.
5. I also don't get the decision to make it a single episode per week and making the runtime shorter. This worked exactly against the series. As a Kdrama fan i am so used to seeing at least 2 episodes per week (or in the case of Netflix a massive dump of full season) cause that kept me hooked and lets me retain the story better. With Grid, i kind of forgot there are new episodes and frankly didn't care to watch it on time.

They managed to make a series that you need to rewatch, but not for good reasons. You have to, especially the last 2 episodes because watching it for the first time is not enough to make any sense, however watching it the second time i think made it worse. If there's anyone willing to explain the ending to me, please I'll be all ears.