On what I understand, This drama is a story about a guy whom parents were killed by a woman during her creation of the grid and who has a power to control time, and he wants to know why, what and how and wants to change it--the reason why he works at that organization that controls or the one that operates the Grid that protects the earth from the solar wind that is deadly and may cause the destruction of the earth and mankind.
The story is interesting because I am actually a fan of this kinds of theme , something about the future and time traveling or what would be the earth looks like, the people , the places and the technologies on the future. The motive of Sae Ha here is to change everything as I have mentioned earlier, things got more exciting when he was able to time travel also after many studies and searches , he was able to implant the chip and use the device that the woman use to time travel, and to is it create the grid or operate the grid? not really sure, he found out that there was no really solution to save both mankind and his parents after traveling time and trying to change everything. I am just disappointed on the choice he made, his main objective here became pointless and all his hard work and studies became useless after he chose the man kind over his parents. it was a good decision but not good for him, if I were him I will just be where I am able to be with my parents alive !
The woman's character here is a bit confusing, is she something like a god? on the part where she seems connected to the police woman I did not understood it clearly , and also did not understand why he was saving the son of the janitor who became a criminal all along, it was shown here that she seems the one who participated or created the grid that protects the earth but where did she came from,. and why does she eat so much sweet foods and liters of Soda !?
All in all I think this needs more episodes to justify the ending? i think it was rush, but since so far I was able to go through it I think it is good , the setting was nice , I just did not get why the inside of the building was gray ? maybe to look like more futuristic is it ? but is was just 2021 there, Seo Kang Joon did a great job , he was actually the reason why I watched this. a good drama but I might not recommend this one