Series synopsis
Undercover High School, also known as 언더커버 하이스쿨 is a South Korean action & adventure comedy drama television series that premiered on MBC on February 21, 2025. It ended on March 29, 2025. It was created by Im Young-bin, Choi Jeong-in. It stars Seo Kang-joon, Jin Ki-joo, Kim Shin-rock and Kim Min-ju.
Ace NIS agent Jung Hae-seong is demoted after a mission failure. He goes undercover at a high school to locate King Gojong's missing gold, meeting his teacher Oh Soo-ah, who sees him as her lost first love, stirring old heartbreak.
Premise
Ace NIS agent Jung Hae-seong is demoted after a mission failure. He goes undercover at a high school to locate King Gojong's missing gold, meeting his teacher Oh Soo-ah, who sees him as her lost first love, stirring old heartbreak.
Cast and characters
Leading cast
- Seo Kang-joon as Jeong Hae-sung
- Jin Ki-joo as Oh Su-ah
- Kim Shin-rock as Seo Myung-ju
- Kim Min-ju as Lee Ye-na
- Yoon Ga-i as Park Mi-jung
- Kim Young-ah as Im Chung-ha
- Lee Hyun So as Han Seung-jae
- Yun Chae-bin as Yun Chae-rin
Supporting cast
- Kim Sun-min as Ji Hyeon-jun
- Kim Seung-beom as Kim Ho-jin
- Kang Pil-jun as Son Beom-Sik
Guest cast
- Su Hyun as [Student]
Episodes
This series spans 2 seasons with 13 episodes.
| Season | Episodes | First aired | Last aired |
|---|---|---|---|
| Season 0 | 1 | January 27, 2025 | January 27, 2025 |
| Season 1 | 12 | February 21, 2025 | March 29, 2025 |
| Episode | Title | Air date |
|---|---|---|
| 1 | Episode 1 | January 27, 2025 |
| Episode | Title | Air date |
|---|---|---|
| 1 |
The Emperor's Lost Gold After a botched operation puts Hae-sung and his team in serious jeopardy, the only way for him to salvage his career at the NIS is to accept an assignment that seems almost hard to believe. Hae-sung and his team must infiltrate Byeongmun High School, one of Korea's most elite private institutions, to recover ten tons of gold bars worth a staggering 80 million dollars. With everything on the line, Hae-sung puts on a school uniform, and "Operation Undercover High School" begins. |
February 21, 2025 |
| 2 |
Spooky Stories Hae-sung comes dangerously close to blowing his cover while searching for the hidden gold in Byeongmun High School's eerie old building, barely escaping detection by Soo-ah, his sharp-eyed homeroom teacher. As he hears chilling rumors and faces tight security surrounding the building, he believes that's where he'll find the gold. While dealing with school bullies, Hae-sung begins plotting his next move to uncover the dark secrets lurking inside the old building. |
February 22, 2025 |
| 3 |
Ghost Story Riddles Hae-sung uncovers a crucial clue hidden within the old building, but Chairwoman Seo quickly learns its potential connection to the elusive gold bars. Sensing the connection, she keeps Hae-sung under close watch. Meanwhile, as Hae-sung delves deeper into the ghost stories surrounding the school, he finds himself caught in the escalating tension between Tae-soo and Dong-min, whose conflict ignites chaos throughout the school. |
February 28, 2025 |
Production
Release
| Original network/platform | MBC |
|---|---|
| First aired | February 21, 2025 |
| Last aired | March 29, 2025 |
| Runtime | 70 minutes |
| Status | ended |
| Schedule | Friday, Saturday at 21:50:00 |