I am up to Episode 3 and from what I am seeing this drama also address the agencies and system that wrongfully accused students of being NK spies. The investigator confronts the Chief who wanted to stop the investigation, (summary of translation provided: "even with clear evidence that he is a spy you want to stop the investigation, however, we detained and interrogated innocent people and accused them of being spies." Let's see how this unfolds. If you are not viewing the show then you are only speculating about the content.

Episode 5 ratings have improved a lot with 2.5% viewership, Korean people are no longer "hating" as much as they once hated, this site only caught the worst comments, there is a part that is in favor of continuing the drama for its political values, and others for freedom of creation, and on the one hand against the argument of being a manipulation of facts, I think the hostile climate that was in South Korea has passed and it will not be cancelled, but more importantly that it was the audience I think it's very difficult to get what JTBC wanted, 2.5% is a pathetic audience compared to what they wanted, mainly because of the investment made in this series, and with the exit of advertising it's even worse, in short, even if this drama continue (and it will continue) he's already become a JTBC flop, hopefully increasing ratings as the series progresses, but I think it's unlikely.