The overall storyline is good. The pace of the story is quite fast, you can enjoy it since the very first episode. The pace picked up a bit after the phone stops ringing, but you may not notice it since it does not have much difference. You will enjoy more thriller in this show. At first I thought we will get a lot of heartbreaks since Sa-Eon statement about "Call me when there is corpse". I was wrong then. The romance is pretty straightforward, no need any painful flavor of faded or unexpressed love (at least until last episode). The thriller itself does a great job, since I saw a lot of theories appeared prior the airing of each episodes. The return of In-A successfully misleads a lot of audience, since she becomes the first person to side with the main leads. Both lead actors have a quite exceptional performance in this show. Soo-Bin does an excellent job potraying a fragile and vulnerable Hui-Ju, while Yeon-Seok potrays a stiff and strict bureaucrat who doesn't know anything about love and how to love.

Good storyline does not mean it is flawless. Na Yu-Ri does not get a good purpose for second lead, only to complete a second lead love puzzle. On the other hand, it is a bit weird that Sa-Eon keeps allowing Hui-Ju to use the burner phone, even after knowing that it is her behind the blackmails. Sa-Eon is a government negotiatior after all, he must have experience dealing with some threats against the country. However, he somehow fails to notice that the phone maybe hacked or tracked (which is logically, highly possible). On the other hand, I also feel that the killer does not have a really good motive to carry out all of his actions. When Sa-Eon confronts him regarding what he wants, he does not have a clear answer but "I want you to feel the same pain". This makes the killer sounds like a maniac psychopath. However if he is really a psychopath, why it takes so long for him to do this? I get it that he has tried to threaten Sa-Eon earlier, but why suddenly his threats become more successful (even off Do-Jae's plan)? Also the severity of threats those are addressed directly to Hui-Ju is somewhat more dangerous than his threats against his "other enemies", which makes him looks like just crazy about Hui-Ju. There are a lot of bloopers too (shoes, clothes altered, etc). But the biggest one is during the crash scene, Il-Gyeong arrives with her wife and In-A in a car. How is this possible because her wife doesn't follow him to the Memorial Park? AND MOST IMPORTANTLY, PLEASE EXPLAIN HOW SA-EON SURVIVES THE SHOT! IT IS A DAMN SHOTGUN FIRED FROM A VERY CLOSE RANGE!!! The last two episodes look like a spectacular show from the main leads with extreme pace and a bit confusing timeline, and more likely just a fanservice. To me, the last two episodes are total chaos.

I learned from Tiktok that this show reproduces a lot of scenes from Queen of Tears. I was on Episode 6 when I know it, and I did not notice it initially. As I was progressing throughout the new episodes, I began to see it, and I feel they take too much similar scenes (Sa-Eon searching for Hee-Ju in the woods, car chase scene with Sang-U, Sa-Eon first lines when he wakes up at the hospital, and some other scenes that I may have forgotten). Unfortunately, they don't mimic the strategy of soundtrack placement from QoT.

I still recommend this show. It has an enjoyable thriller, with additional sufficient romance. Yes the story quality has dropped a bit after Episode 10, maybe they actually deserve more episodes to explain everything. But hey, at least there isn't any super-uneccessary conflicts towards the end of the show. I would like to give a solid 9 previously, but the messed up final two episodes and excessive number of bloopers make me rethink about it.