Some of these guys have really similar names. XD;

Tae Jin is mainly the cool and restrained one (when it comes to his "friends" and the public) while Jong Soo is hot-tempered and terrible at hiding his emotions. These two are the top of the villain ladder. Don't know much about Chi Hyun yet. Same with Yoon Ho, but now we've learned how dumb and violent he is. Why was he even near the construction site? Just happened to be driving the taxi there?

Joon Seo must have prepared clues for Jae Kyung and Yoon Jin to discover in order to expose some big incident that affects Jong Soo and his business.

The actor playing Jin Wook (Yoo Hee Je) looks familiar. I looked up his past dramas, but don't remember his roles. I was prepared for his demise this week yet he's still ok. He's quick-thinking and observant like he noticed the changes about Doctor. I'm wondering how long he will last and if his role will be more prominent.

I can't tell yet about Chang Soo! The actor playing him (Jung Jae Kwang) can play good and bad characters... I think. However, I've seen him as an antagonist a few times already. I hope he's on Jae Kyung's side though. His acting fits the ambiguous role.

Insurance guy Joo Song is a neutral character at the moment. He seems to be on Jae Kyung and Yoon Jin's side and willing to help, but he could be manipulated by either side.

It's a race against time. Can the murder case and the mysteries surrounding it be solved before Jae-kyeong is so addicted that there's no turning back?

It's good that at least someone close to Jae-kyeong knows his secret, even if Yoon-jin couldn't stop him from taking the drug again in the end.
I like the chemistry between the two of them (this was particularly evident during the break-in at the researcher's house) and hope that they stay in close contact in the end and don't lose sight of each other again.

Right now it looks like Joon-seo was the doctor, but I think it’s a red herring.

As expected, this drama is stressing me out enormously, but I'm enjoying the stress.

I really like the flashbacks to show how Jun Seo, Yoon Jin, Jae Gyeong and Joo Song became friends. Also why the company name is Audio File. It now makes sense why they chose them as his beneficiaries.
I sure hope Jae Gyeong can still be saved after all this. The other addicts all end up dying. I worry for him.

We learn more about the third beneficiary Lee who was a pharma researcher tied to suspicious businessman Jong-Soo, the friend who did not want the autopsy. Prosecutor Tae-In seems to be his lapdog with the twisted quick phrase that they were both “there” when it happened (Joon-Seo’s death). When widow Ji-Yeon changes her mind on the autopsy, the two HS friends seem to panic. Jae-Kyeong must have strange healing powers not to succumb to his highly addictive state when all other addicts turn into unthinking violent animals. (We later see the sunshine hair addict in detention seem to be more calm after a few days without the pill.) Yoon-Jin continues her foray into opening other people’s mail to find more clues on how to get the insurance money. (Maybe because of my journalism roots, I am still put off by the Yoon-Jin character actions. She is unethical and manipulative. From the flashback, it seems she started that way in high school.)

It does seem that the will and insurance was Joon-Seo’s ruse to investigate his death. But a possible overdose and fall from the drug may not prove anything since the creator, Lee, can’t testify about his monster creation. We get the sense that Jong-Soo must be tailing Jae-Kyeong in order to burn evidence trails and entice him with pills. Jong-Soo seems like a slimy bully/punk who likes to put people to the edge to get what he wants. Drug mule Gong gets his box of drugs just before CEO Yoon’s deadline. Gong may be the keystone to unraveling everything and the police have an arrest poster on the streets.

Episode 4 puts more dirt on the prosecutor who knew Lee was already dead when he read the will during the funeral. He is probably the new “Doctor” supplying the drug dealers. I think the prosecutor is looking to move CEO Yoon’s drug money into the project as a means of laundering it - - - and perhaps double crossing Jong Soo. We also learn he had an affair with widow Ji-Yeon and he choked her for her late husband’s password. As a realtor, Joon-Seo may have been the point man in redevelopment project that now appears mired in opposition, death and corruption (which is getting to be a tired trope.) Innocent bystanders like the rice cake owner are getting killed as a result. The taxi driver seems to be following everyone in an enforcer role.

Jae-Kyeong’s Lt. Chang-Soo is one step ahead of him in unraveling his not-so-secret addiction. I would hope he remains a good cop but no one beyond reproach. Jae-Kyeong stealing the pill evidence then telling his team to change the police report to cover up his crime puts his colleagues in professional and legal danger. He really needs to get his act together.

Finally binged all 4 episodes!! This was written for Ji Sung!! He is just so good.

By ep 4, all the players/characters are clear to us audience. I did not expect the widow twist! (what's a kdrama without an affair??)

I really hope Chang Soo isn't on the bad side. I would like it for Jae-kyung to have more people he can rely on. I don't know when the pill popping is going to go out of control. It stresses me out. He is really playing a dangerous game here. But his reasoning makes sense to me. If not for him it will be a dead case by now.

Everything seems to be connected to high school. I am sure the incident 20 years back is linked to whatever is happening now.
I do love the past we are shown. It is really sweet to see them as innocent teens. Makes the current loss and dynamic more meaningful.

Finished all four episodes - quite a tight and fast-paced drama with Ji Sung front and centre. I find Jeon Mi-do’s character refreshing in that she’s not an all good perfect person but becoming materialistic for reasonable reasons, not a textbook professional journalist and it’s the imperfect mess that makes it a strong female character.

There are now enough backstories to guess and bring out more intrigues.

The tension of this drama makes me flip, the female lead is convincing badass journalist , who can be bought .
JiSung i don´t know in every drama he is exceptional, the story is very tense, i think Jae Kyung becomes lost in his addiction.
Maybe they suspend him, and i don´t trust his partner , Chang Soo that guy has something to hide.
Whos is the doctor ....Anyone ?