Kim You-jung and Park Jinyoung’s tvN spy drama hits a new ratings high as bad intel sends the Gugukdan straight into a trap.
100 Days of Deception episode 4 starts with Ga-kyung at gunpoint in a police station and ends with bullets flying across a town square. Starring Kim You-jung and Park Jinyoung, this tvN period drama (streaming on Netflix outside Korea) is all about who knows what, and who is acting on the wrong information. Viewers noticed: Nielsen Korea put the episode at a nationwide average of 9.0 percent on Sunday, October 18, the show’s highest rating so far, up from 5.3 percent for the premiere. It also ranked first in its time slot across all channels. Here’s the full recap, then my honest review, what worked, what didn’t, and my score.
100 Days of Deception Episode 4 Recap: Bad Intel, Worse Timing
Interrogation at Jongno Police Station
Ga-kyung has been captured and finds herself in Jongno Police Station. She keeps playing the role of Soe-hee the interpreter while she’s questioned at gunpoint, and eventually she admits she isn’t a spy.
That’s when the truth comes out: the whole thing was a ruse staged by the Gugukdan. Interestingly, So-ran apparently had no idea. But Ga-kyung isn’t entirely fooled either. She brings up her own history with the Jongno cops, including the rough way they handled things in her village. She knows exactly how brutal their beatings are, and she tells the Gugukdan they got it wrong, pointing out the blindfold and the poor acting.
Philip has heard enough. When Ga-kyung refuses to talk about Korean independence and says she wants to leave, he pulls a loaded gun on her. So-ran steps in to calm things down and shares her own history with the guards, including the death of her daughter. For now, Ga-kyung stays on their side. Privately, though, So-ran admits to Philip that Ga-kyung can never find out they don’t actually have any way to get her to America.
Tae-woong’s Search and Shinichi’s Contempt
Meanwhile, Tae-woong keeps digging for details about his mother. He doesn’t want Shinichi to find out, and he’s also preoccupied by troubles of his own involving the Japanese. He hears about Lee Bong-chang’s attempt to assassinate Emperor Hirohito in Tokyo. For context, that real attack happened in January 1932, when Lee, a Korean independence activist, threw a grenade at the Emperor’s procession at the Sakuradamon Gate. Hirohito was unharmed and Lee was executed that October. It comes after earlier bombing attempts too, so the rebels are clearly pushing harder.
Shinichi sees Koreans as scum. He calls their hope for independence delusional and says he intends to root it out completely, convinced that he will be the one who shapes Joseon’s future.
A Limp, an Elevator, and a Secret Clinic
At work, Ga-kyung hides the leg injury she got from the Gugukdan’s rough treatment. She promises Tae-woong she’ll give back the pawn ticket as soon as he finds the right shop, which is, of course, a lie. He notices her limping when he asks her to deliver a message to the fourth floor. Eventually she swallows her pride and asks for his help, because as a Korean she isn’t allowed to use the elevator.
Tae-woong takes her to a medicine clinic to get her foot checked. What he doesn’t know is that it’s also the Gugukdan’s hideout, and her doctor recognizes Ga-kyung immediately. The doctor steps out and gets pulled away by an emergency case, so Tae-woong steps in and bandages her himself.
He also asks Ga-kyung not to tell Philip that she “likes him,” since he wants to keep things friendly for business reasons. Right on cue, Philip shows up and leads her outside. He’s furious that she risked bringing Tae-woong to them, but she didn’t even know the place was their den, and she’s quick to say so.
Through all the chaos, Tae-woong is still holding her ointment. He chases them down in the alley and hands it to Ga-kyung, then sees Philip gripping her wrists and gets suspicious.
The Ointment Scene and a Misleading Schedule
Back at the house, So-ran applies the ointment to Ga-kyung upstairs. Ga-kyung uses the quiet moment to ask about Soe-hee’s father. So-ran quickly dodges the question and steers the conversation back to the schedule Ga-kyung copied.
According to that document, Shinichi is set to deliver a speech, and a newspaper reports the same thing, which makes it look like the perfect moment for the Gugukdan to strike. So-ran asks Ga-kyung about it, and she explains that she overheard the Publications division working on a book about the history of Joseon. So-ran believes her, especially since Ga-kyung insists she’s going to earn her keep. That also means Shinichi will be at the Government-General at the time of the ceremony.
Ga-kyung is there too. She phones Philip and tells him in English that the Inspector General isn’t giving a speech after all. Philip hangs up right away and rushes off, which is a real problem, because the Gugukdan has already gone ahead with an operation that evening based on different intel. When Ga-kyung opens the door, she finds Tae-woong standing there, and he doesn’t look happy to see her.
The Strike That Goes Wrong
The Gugukdan sets up its attack. So-ran takes position as a sniper in a nearby window, while Chul-ryong rides alongside the oncoming car, ready to take the killing shot. But Shinichi isn’t in the car. It’s a decoy, and inside, tied up in the back seat, is Jeong-yeop.
Chaos breaks out. Japanese soldiers who were lying in wait pounce, and a huge shootout erupts in the town square. Jeong-yeop is shot in the crossfire and killed, even as Young-bok tries to help him. The Chief of Police arrives, and Fukuda dodges So-ran’s shot and returns fire immediately when one of his subordinates is hit. So-ran takes a bullet too, though it doesn’t look fatal. As the episode ends, the Gugukdan is pinned down under heavy fire.
My Review: Ga-kyung and So-ran Have More in Common Than They Think
This was another strong hour for a drama that keeps weaving real history into its spy plot. The Lee Bong-chang mention grounds Tae-woong’s storyline in actual events, and the detail that Ga-kyung can’t use the elevator because she’s Korean says a lot in one small beat. Honestly, that line landed harder for me than some of the big speeches.
What I enjoyed most is how much Ga-kyung and So-ran share. The ointment scene is the clearest example: two women with painful histories sitting in a quiet room, one probing for answers and the other refusing to give them. Both lost something to the same system, and the show handles that parallel with a light touch. I also like the way Ga-kyung calls out the Gugukdan’s fake interrogation. She’s the one person in the room who has real experience with police brutality, and she isn’t buying their performance.
I’m still not sure whether Ga-kyung is actually warming up to Tae-woong, but I’ll say this: the two have good chemistry. They get a handful of scenes that develop both characters, including the clinic sequence, and that builds toward the chaotic ending. The street shootout is a gripping way to close, and it comes right as the show’s numbers are climbing. It leaves everything hanging by a thread ahead of the next episode.
What Works
- Ga-kyung exposing the ruse. She spots the beatings, the blindfold, and the poor acting, and she says so. It shows her instincts and her history in one scene.
- The ointment scene. Quiet, revealing, and full of subtext, with So-ran dodging a question about Soe-hee’s father.
- Historical texture. The Lee Bong-chang reference and the elevator restriction anchor the story in a real, painful period.
- Tae-woong and Ga-kyung. Their scenes together add layers to both characters and keep the possible romance unresolved in an interesting way.
- The final shootout. Decoy car, ambush, a sniper in a window: it’s tense and chaotic, and the stakes feel real.
What Doesn’t
- The ruse itself. The Gugukdan’s staged interrogation is clumsy enough that Ga-kyung calls it out, and the fact that So-ran wasn’t even told makes the group look disorganized.
- Mismatched intel. The Gugukdan acting on one set of information while Ga-kyung has another stretches the plot a bit. I wanted a clearer reason why the group didn’t confirm the details first.
- Little weight for new faces. From what this episode shows us, Jeong-yeop’s death doesn’t carry as much impact as it could, because we barely know him.
- A lie with a clock on it. So-ran admits that they can’t get Ga-kyung to America. It’s a smart bit of tension, but it also makes me dread the moment she finds out.
Final Rating: 8.5/10
A strong, twisty episode with solid character work and a cliffhanger that raises the stakes. A few clumsy plot mechanics hold it back from a higher score, but I’m still fully invested.
100 Days of Deception Episode 4 FAQ
What was the Gugukdan’s ruse in episode 4? They staged Ga-kyung’s capture and interrogation to test her. So-ran apparently wasn’t aware of it, and Ga-kyung called out how unconvincing it was.
Can the Gugukdan actually get Ga-kyung to America? So-ran privately admits to Philip that they have no way to do it, and she says Ga-kyung can’t find out.
When does 100 Days of Deception air? Two episodes premiere every Saturday and Sunday at 9:10 p.m. KST on tvN, from October 10 to November 29, 2026. It streams on Netflix internationally.
100 Days of Deception Episode 3 | 100 Days of Deception Episode 5
