Being a secret agent is hard enough. But being a secret agent pretending to be a high school student? That’s just asking for trouble. And let’s be honest—Hae-sung isn’t exactly doing a stellar job at keeping a low profile.
In Episodes 3 and 4 of Undercover High School, the stakes are getting higher. Our hero, on a mission to find hidden gold, finds himself entangled in teenage drama, corrupt school politics, and a conspiracy that might just expose him before he even gets close to his goal. When a scandal threatens to end his mission prematurely, Hae-sung has to think fast—because the wrong move could mean the end of both his spy career and his high school life.
TL;DR
- Secret agent struggles to keep his cover.
- School’s hidden treasure is tied to urban legends.
- Bullying and corruption create school chaos.
- Romantic feelings develop between agent and teacher.
- Agent’s team supports him from a disguised location.
- Agent uses spy skills to overcome school obstacles.
- Truth and lies create complex relationships.
A Mission Gone Sideways
For someone on a top-secret mission, Hae-sung has a real knack for getting into trouble. His attempts at staying under the radar have completely failed, landing him in the crosshairs of the school’s sinister director. As if juggling a covert operation wasn’t enough, now he’s entangled in a school scandal that could end his cover before he even gets close to the hidden gold. Teenage life is already a battlefield, but when you throw in espionage and high-stakes treasure hunting, the drama reaches another level.
The Search for Gold Takes a Backseat
While the ultimate goal remains uncovering the hidden treasure, this week’s focus shifts to Hae-sung’s chaotic school life. However, he does manage to stumble upon a crucial clue—turns out, the skeleton he and Dong-min found was nothing but a staged prop planted by the school’s original founder, a notorious embezzler. The real puzzle lies in the four urban legends circulating through the school. These eerie stories aren’t just ghost tales; they’re actually coded clues leading to the treasure’s location. Lucky for Hae-sung, Dong-min is an urban legend aficionado and quickly shares the next one: when a student hears the old grandfather clock chime while alone, glowing red eyes will appear.
Meanwhile, Myung-joo remains a textbook villain, watching Hae-sung closely as he pieces the puzzle together. She’s playing the long game, letting him do the heavy lifting while she waits to swoop in at the right moment. But her wickedness doesn’t stop there—her daughter, Ye-na, lives in constant fear of her mother’s perfectionist obsession. Myung-joo even forces Ye-na to take Adderall so she can stay awake longer to study. A mother’s love? Not quite.
The School Bully Makes His Move
Ye-na, for all her mother’s controlling tendencies, has her own agenda. She’s intrigued by Hae-sung and keeps a close eye on his interactions with Tae-soo, the resident school bully. But things spiral when Tae-soo, desperate to pay off his gambling debts, pulls a dirty trick. He convinces Dong-min’s grandmother to hand over her ID by pretending to be Dong-min’s friend, Hae-sung. He claims the school needs it for a scholarship, and the unsuspecting halmeoni complies without hesitation.
When Soo-ah, the determined teacher, hears about the ID situation, she initially believes the false accusations against Hae-sung. But then, reality slaps her in the face when she personally witnesses Tae-soo bullying Dong-min. Realizing the extent of corruption in the school, she decides she’s had enough. Despite pressure from her colleagues to look the other way—because Tae-soo’s father holds political clout—Soo-ah refuses to stay silent. She apologizes to Hae-sung and anonymously exposes Tae-soo’s misdeeds on the school’s online forum.
A Web of Lies and Betrayal
Unfortunately, the truth doesn’t always set you free—sometimes, it just makes things worse. In retaliation, Tae-soo strong-arms Dong-min into publicly refuting the allegations and instead naming Hae-sung as the bully. Feeling trapped after his grandmother’s arrest, Dong-min has no choice but to comply. The fact that Hae-sung doesn’t hold it against him only makes the betrayal sting more.
But what Dong-min doesn’t realize is that Hae-sung isn’t just another helpless student—he’s got an entire team of elite operatives backing him. The team, needing to be closer for support, sets up a temporary base in the most unexpected place—a local Quiznos. Suddenly, the spy squad is running covert missions while serving up toasted subs, seamlessly blending espionage with customer service.
A Plot Twist in the Disciplinary Hearing
Thanks to his team’s intel and some classic spy maneuvering, Hae-sung flips the script at his school disciplinary hearing. He arrives in dramatic fashion—on a motorcycle, no less—and presents undeniable evidence against Tae-soo, including a USB loaded with video proof. Not only does he get Tae-soo expelled, but his popularity skyrockets overnight. Even Ye-na starts nudging him toward running for the now-vacant student council seat. And wouldn’t you know it? The student council room just so happens to house the grandfather clock—the very one Hae-sung needs access to for his mission.
The catch? He has to collect 100 signatures and drastically improve his test scores within a week. No pressure.
Family Drama and Election Roadblocks
Just when he thinks his biggest challenge is campaigning, his little cousin Yoo-jung throws a wrench into his plans. She’s horrified at the idea of him joining the council and outright forbids it. Her distress is more than just overprotectiveness—Yoo-jung herself is on the council but is treated as nothing more than a glorified servant. Forced to fetch coffee and carry bags for the elite students, she doesn’t want her cousin subjected to the same humiliation. But Hae-sung, being Hae-sung, isn’t easily dissuaded.
Romance on the Horizon?
While action and espionage dominate the plot, romance starts creeping into the narrative. As Soo-ah and Hae-sung join forces to protect Dong-min and his grandmother, their connection deepens. There are stolen glances, lingering moments, and a subtle realization that Soo-ah might be seeing Hae-sung in a different light. The problem? He’s supposed to be a high school student, and everything about him—from his demeanor to his overly competent nature—screams otherwise.
To make things even more complicated, Soo-ah realizes Hae-sung reminds her of her childhood crush. And plot twist—he is her childhood crush. The only reason they didn’t recognize each other earlier? They’ve both changed their names over the years. Their old dynamic of playful rivalry starts resurfacing, adding another layer of intrigue to their already tangled relationship.
Chaos, Cover-Ups, and a Classic K-Drama Moment
Government bureaucracy adds another obstacle when Hae-sung is suddenly summoned for military reserve training—despite being in the middle of an undercover mission. Thankfully, it’s just a one-day mishap, but it forces him to call in sick from school. Meanwhile, Soo-ah, ever the concerned teacher, decides to check in on him by bringing porridge to his apartment.
The problem? His cover identity’s apartment isn’t set up yet. In a frenzied scramble, his team throws together a last-minute disguise, stuffing themselves into a closet just as Soo-ah arrives. What happens next? The classic accidental fall-and-kiss trope. Yep. Hae-sung trips, lands on Soo-ah, and their lips meet in the most unplanned way possible. And just when she’s still processing what happened, his entire team comes crashing out of the closet like a slapstick comedy routine.
At this point, Soo-ah’s suspicion levels are through the roof. The fact that Hae-sung’s identity hasn’t been completely exposed yet is nothing short of a miracle. But she’s getting closer to the truth, and it’s only a matter of time before she figures out the bigger picture. Whether she’ll be a valuable ally or another obstacle remains to be seen, but one thing’s for sure—she’s not going to let this mystery go.
Final Thoughts: What’s Next for Hae-sung?
Between the treasure hunt, school politics, and an increasingly tangled web of relationships, Hae-sung has his hands full. With each episode of this K-Drama, the stakes keep rising, and his mission becomes even more precarious. The question now is: will he be able to juggle it all without blowing his cover? And more importantly, how long before Soo-ah cracks the code and uncovers his true identity?
With the pace this story is moving, the next episodes promise even more unexpected twists, shocking revelations, and—let’s be real—probably another accidental kiss or two.
