

A comic action drama about an NIS agent who hid his identity and entered high school disguised as a high school student to find the missing emperor's gold bullion.
Byungmoon, Korea’s top private high school, is rife with corruption, where status and success matter most. Hae-sung, a top NIS agent, goes undercover at Byungmoon to find Emperor Gojong’s hidden gold and uncover the truth behind his father’s disappearance. Cold and calculated, he sees the school as an obstacle—until he connects with students and a former crush and becomes a reluctant hero. Torn between duty and newfound bonds, can he still complete his mission?
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Type
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Premiere DateFeb 21, 2025
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Country
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Genre
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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 Hyeon-so as Han Seung-jae
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References
S01E06 Hae-sung's Father's Notebook
The school's security guard dies, leaving Hae-sung a notebook belonging to his missing father. The revelation is shocking, and he storms the NIS for answers. The answer pushes him away from the mission, and he takes time off. However, he resolves to continue but returns only to discover Soo-ah witnessed it all.
Browse
- S01