The core story was strong, but had weak branches. You could climb it sure, and when you reach the top you feel delighted, but you have to be prepared for weak footfalls on the lower branches, at the threat of wanting to jump to the ground, and come back another day. The main story is of a serial killer, using an iron ball to satisfy his sadistic pleasures. When Jin Hyuk's wife is murdered in the opening scenes, the game is strong and you watch him (Jin Hyuk, not the serial killer^^) team up with Gwon Joo, who's cop father was also murdered by the same guy, as she heads the "Golden Time Team" at their local precinct. A team that is dedicated to reaching any crime scenes within the golden period before it ends for the worse - 10 minutes. With this set in place, we have to sit through this team being put into use, with my favourite side story, of a foster kid behind abused by his mum, in a repeat cycle of what happened to her so he called 112, to my least favourite set in a mental centre, where homeless people are being fleeced and then killed. Seemingly random, but providing leads to the serial killer. I didn't know whether to be pissed or happy. Happy, is what I went with. Imagine if I had sat through all those cute, protracted spin-offs and there wasn't a point? The serial killer does not hide. No, he is almost luxurious in the way he hunts and reveals himself. Extremely arrogant of being untouchable (typical privileged Korean kid, lol^^) However, he was willing to lose that power, just so it would create maximum torment within the two he was obsessed over. Jin Hyuk and Gwon Joo. One of the best scenes including Mo Tae Gu (and there were many) was when he was wheeled out of hospital, escaping, but yet he roared because he didn't want to escape, but be back in their clutches. Wow! Kim Jae Wook is excellent, the best thing in the last four episodes. Lee Ha Na has this breathy style of speech she adopted here, which I grew used too, so I was cool with the girl by the end. Jang Hyuk was in the middle of these two, somewhere in terms of acting talent and commitment. I could see myself rewatching the first two episodes, and the last four alone. That's it. For that, I will give a high rewatch score. If you like crime/detective dramas, this is the best one out of 2017 for sure. But the year is early yet 8D