Synopsis of Korean Drama Undercover High School: Agent's Secret Mission in School

Table of Contents

The Korean drama industry is back with an interesting show with the presence of UNDERCOVER HIGH SCHOOL, the latest drama that combines action, comedy, thriller, and romance in one package. This drama is a highly anticipated project because it features popular actor Seo Kang Joon as the main character after a three-year hiatus.

With a premiere scheduled for February 21, 2025, UNDERCOVER HIGH SCHOOL is ready to entertain Korean drama fans through the MBC channel and the VIU streaming platform. This drama consists of 12 episodes, each lasting around 1 hour and 10 minutes, and it presents a story full of tension and surprises in every scene.

Director Choi Jung In and writer Im Young Bin, who were previously successful with BAD PROSECUTOR, collaborated to present this action-packed drama. In addition to Seo Kang Joon, this drama also stars Jin Ki Joo, Kim Shin Rok, Kim Min Ju, Yoon Ga Yi, and many other talented actors. So, what is the storyline of UNDERCOVER HIGH SCHOOL? Check out the following review.

Synopsis of Undercover High School

Korean DramaUndercover High School is an action comedy-drama that tells the story of a National Intelligence Service (NIS) agent, Jeong Hae Seong (played by Seo Kang Joon), who goes undercover as a high school student in Byeongmoon to track down Emperor Gojong's missing gold.

Jeong Heo Seong is an NIS field agent who has great talent. After being given a special mission, Seong goes undercover as a high school student so as not to attract the attention of many people. However, during his mission, Jeong Heo Seong is accidentally involved in an unexpected incident that makes his life seem like he has two different lives.

In a new trailer, Jeong Hae Seong is seen to have transformed into a high school student. Although he is dressed like other students in general, Seong still emits his sharp gaze when observing the conditions around him. This hints at Jeong Hae Seong's true identity as an NIS agent.

Not only that, Hae-Seong also meets Teacher Oh Soo-A (played by Jin Ki-Joo) as his homeroom teacher. Seeing the elegance of his homeroom teacher, Hae-Seong begins to see his first love and falls in love with the teacher.

The journey of this NIS agent finally changes, from initially only focusing on finding the lost gold, Jung Hae-Seong begins to fall in love. However, this condition actually triggers many problems that he must face.

Then, will agent Jung Hae-Seong succeed in finding Emperor Gojong's lost gold and at the same time win the heart of his first love?

Interesting Facts about Undercover High School

1. Undercover High School Produced by the Writer of Bad Prosecutor.

The drama Undercover High School was written by an experienced writer, Im Young-Bin. This drama also marks his writing career after last becoming the writer of the Korean drama Bad Prosecutor which was released in 2022.

In addition to Bad Prosecutor, Im Young-Bin was also a writer for the drama Sketch which aired in 2018.

2. Undercover High School is Seo Kang Joon's Comeback Drama after 3 Years.

Undercover High School marks Seo Kang Joon's comeback in acting after a three-year hiatus. Most recently, Kang Joon starred in Grid which was released in 2022.

In addition to being known for starring in many dramas such as When the Weather is Fine (2020), Watcher (2019), Something About Us (2019), and others, Kang Joon has also starred in several films, such as A Year-End Medley (2021), Summer Snow (2015), The Beauty Inside (2015), and My Love, My Bride (2014).

3. Undercover High School Combines Action and Comedy Themes.

Undercover High School is the latest Korean drama that combines action and comedy themes. In addition, this drama also presents a romantic side that will make the storyline even more interesting.

Undercover High School Cast

Here is a list of Undercover High School drama cast:

• Seo Kang Joon as Jung Hae Seong
• Jin Ki Joo as Oh Su A
• Kim Min Ju as Lee Ye Na
• Kim Shin Rok as Seo Myeong Ju
• Yoon Ga Yi as Park Mi Jeong
• Kim Young Ah as Su A's mother
• Lee Hyun So as Han Seung Jae
• Lee Seo Hwan as Kim Hyeong Bae
• Park Se Hyun as An Yu Jeong
• Shin Jun Hang as Lee Dong Min
• Joen Bae Soo as An Seok Ho
• Jo Sok Rae as Ko Young Hun