I might be overreacting but this drama is what I would like to call: disappointment + frustration = Junky.

This drama started off well, it was quite intriguing considering the fact that I haven't seen a lot of good kdramas this year. But then after one or two eps after eps 5, the disappointment started.

They started adding new information to the drama, which made the drama seem like a whole other drama when I watch the new episodes.
The characters weren't put to good use, take for instance a character like Do Yeon, she was a reporter they could have done a lot of things with her character like bringing awareness to others and getting information. but no they didn't do that. I really despised the way they made it seem like prof. Yoon and Park Jin Gyeom were the only important character. And not only did they do that I feel like they could have made Prof. Yoon's character bring more to the table, they just made it seem like she was nothing without Park Jin Gyeom.

And I also wanted to see more of Prof. Yoon and Do Yeon work together toward the end their teamwork was admirable.

The end was really really unsensible if you'd ask me, anyone, who watched it ould have known it was rushed and while trying to come up with a thrilling idea, the best they could come up with what they gave us.

I would recommend watching the first 5-6 eps and then leave the rest to your imagination If you don't want to be disappointed like I was.