Season 1
12 episodes
0 min. per episode
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A disgraced agent reenters a world of lost love and betrayal while hunting for stolen gold in a high school.
Episodes
After a failed mission, an NIS agent must go undercover at an elite high school with his team to recover $80M in gold bars. To save his career, Hae Seong dons a school uniform for this unlikely assignment.
Hae Seong nearly reveals himself while hunting for gold in the school's old building. Evading teacher Su A, he faces bullies and tight security as he plans his next search amid disturbing rumors.
Hae Seong uncovers a crucial clue hidden within the old building, but Chairwoman Seo quickly learns its potential connection to the elusive gold bars. Sensing the connection, she keeps Hae Seong under close watch.
Hae Seong attends the anti-bullying committee session with a key witness who clears his name, while Dong Min finally finds the courage to stand up for himself.
Hae Seong and the team grow increasingly concerned that Su A's suspicions could threaten his undercover mission. However, Hae Seong defies the odds and successfully gains a spot in the student council.
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.