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.

언더커버 하이스쿨

Action & Adventure, Comedy, Drama

Returning Series

2025-02-21

70 mins