Nine Puzzles ~ 10 Years and You Haven't Caught the Killer?

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“Nine Puzzles” is a 2025 Korean drama series, with 11 episodes, categorized as Psychological Thriller, Crime, Mystery, Police procedural, and Murder Mystery; a Hulu Original, streaming on Disney+/Hulu. SUMMARY: A high schooler who was once the prime suspect in the murder of her uncle grew up and became a criminal profiler. It’s been ten years, and the detective initially assigned to the case continues to keep her on his radar because he thinks she did it. But she’s so smart, nobody has figured out how to catch her. However, when a series of murders occurs and each incident is marked by a puzzle piece, the detective and the profiler have to work together to solve these crimes. Could it be the profiler is a serial killer?
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Nine Puzzles ~ 10 Years and You Haven’t Caught the Killer?

"Nine Puzzles" is a 2025 Korean drama series, with 11 episodes, categorized as Crime, Thriller, Police procedural, and Murder Mystery; a Hulu Original.

popgeeks.com

 

[TabithaRates]

Honestly, I’m not convinced she did it. Her being smart and rich doesn’t mean she’s guilty. The detective seems obsessed, and that’s a problem. If he can’t think clearly because of a bias, the real killer might still be out there. I think the show is trying to make us doubt her on purpose. That’s what makes it interesting.

 

[Kakaoma]

Kim Han-Saem is not a good detective in my opinion. Ten years and no arrest? He still just suspects the same person with no new proof? That sounds like he’s stuck in the past. And now he has to work with Yoon E-Na? That’s not justice, that’s personal. If he really wants to find the truth, he needs to let go of his assumptions. I think the story is more about obsession than guilt. Yoon E-Na might be weird, but that doesn’t make her a killer. Maybe the real murderer knows how to hide better than anyone.

 

[DramasOverKimchi]

I loved the first episode. That scene with the puzzle piece and blood—very shocking. The whole atmosphere of the show feels cold, quiet, and suspicious. I like how the story keeps you guessing. Yoon E-Na is a strange person, but she seems more lost than guilty to me. Her becoming a profiler feels like a way to cope. Maybe she wants to understand what happened to her uncle, or maybe she blames herself even if she didn’t do it. I’m excited to see if she recovers her memory. If she’s innocent, I think it’ll break her when she finally remembers.

 

[Murido]

It feels like Yoon E-Na is not trying to hide anything. She’s right in the open. If she really was the killer, would she keep asking the police why it hasn’t been solved? That makes no sense to me. I think someone is messing with her. The new puzzle piece proves that. The real killer wants her involved again. That’s creepy. I hope she survives this second round of murders.

 

[Mulee Ziraz]

Her thrill-seeking behavior, her cold manner, her strange interest in death—none of that is normal. I believe she is a psychopath who just hasn’t been caught. It’s not about proving it in court, it’s about reading the signs. The story gives us many clues. Even her memory loss sounds fake. I think the puzzle killer is her. Maybe it was always her. Maybe she enjoys watching others suffer. Some people are just born that way.

 

[MingMing]

From a writing perspective, “Nine Puzzles” is solid. The pacing, the tension, the way each episode ends—it’s tight and deliberate. I especially like how Yoon E-Na’s past is revealed in small pieces, like the puzzle theme itself. Her character is complex. She might be a victim, or she might be a mastermind. The drama doesn’t spoon-feed the answer, and that’s what I appreciate. The writers trust the audience to think.

 

[Carly]

This is why I love Korean thrillers. They don’t make it easy. You don’t get clear answers right away. You sit with the doubt. Yoon E-Na could be innocent. Or guilty. Or both. Maybe she didn’t kill her uncle, but she killed someone else. That dual possibility keeps me watching. The performances are strong, especially Kim Da-Mi. She makes the character feel real but unreadable. I think the show is less about crime and more about identity—how we deal with our past and whether we can trust our own mind.