Undercover High School

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.

Undercover High School is a 2025 thriller action movie, starring Kim Shin-rock, Seo Kang-joon, Jin Ki-joo. It holds an IMDb rating of 7.7/10 from 4,363 votes and runs 1h 10m.