About this series
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.
Quick facts
First aired
2025
Seasons
1
Episodes
12
TMDB Rating
⭐ 8.0/10
Votes
57
Genre
Action & Adventure, Comedy, Drama
Status
Ended
Network
MBC
Creator
Language
KO
Seasons & Episodes
S01E01
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…
S01E02
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 sh…
S01E03
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 ke…
S01E04
Joining the Student Council
Hae-sung attends the anti-bullying committee session with a key witness who clears his name, while Dong-min finally finds the courage to stand up for himself. With his name vindica…
S01E05
Student Council
Hae Seong and the team grow increasingly concerned that Su A's suspicions could threaten his undercover mission. However, Hae Seong defies the odds and successfully gains a spot in…
S01E06
Hye Seong's Father's Notebook
The school's security guard dies, leaving Hae Seong a notebook belonging to his missing father. The revelation is shocking, and he storms the NIS for answers. The answer pushes him…
S01E07
The 24th Anniversary of Byeongmun High School
Hae Seong is caught off guard when he recognises Su A's childhood name, Bong Ja, which stirs memories of his first love and distracts him from his focus. Despite the emotional turm…
S01E08
The Plan for VIP Students
After uncovering the possibility of a mole within the NIS, Hae Seong becomes increasingly distrustful of those around him, causing him to question the mission's integrity. Meanwhil…
S01E09
The Mathematics Teacher
As Su A recovers in the hospital following the attack during the break-in, Hae Seong and the team uncover the culprit: Lee Jun Ho, the mathematics teacher. When Hae Seong detects h…
S01E10
Retribution
To everyone's shock, Seo Myeong Ju returns to the school. Unimpressed by Hae Seong, she expels him and demonstrates her power by dismantling his team. However, refusing to back dow…
S01E11
The Devastating Truth
The gold bars vanish just as they are within reach, and Seo Myeong Ju suspects Hae Seong has them. In the vault, Hae Seong makes a heartbreaking discovery of his father's remains. …
S01E12
Where The Stars Lead
Despite getting badly injured, Hae Seong manages to call Su A and his team. They conclude that the only evidence they can secure is the flash drive that contains the voice recordin…
Available on
Cast
undercover agent
romcom
romance
agent
comforting
Questions about Undercover High School
How many seasons does Undercover High School have?
Undercover High School has 1 season and 12 episodes total.
Who created Undercover High School?
Undercover High School was created by Im Young-bin and first aired in 2025.
What genre is Undercover High School?
Undercover High School is a Action & Adventure, Comedy, Drama series.
Who stars in Undercover High School?
The cast of Undercover High School includes Seo Kang-joon, Jin Ki-joo, Kim Shin-rock, Kim Min-ju, Yoon Ga-i.
What is the TMDB rating for Undercover High School?
Undercover High School has a TMDB rating of 8.0/10 based on 57 votes.
