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.
No of Seasons: 1Total episodes: 12First Air Date: 2025-02-21Last Air Date: 2025-03-29
