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.
Trailer
Cast
Seo Kang-Joon
Jeong Hae-seong
Jin Ki-joo
Oh Soo-ah
KM
Kim Min-ju
Lee Ye-na
Kim Shin-rock
Seo Myeong-joo
KY
Kim Young-ah
Soo-ah's Mother
Lee Seo-hwan
Kim Hyeong-bae
Jeon Bae-soo
Ahn Seok-ho
Park Se-hyun
Ahn Yoo-jeong
Jo Bok-rae
Go Young-hoon
YG
Yoon Ga-yi
Park Mi-jeong
PJ
Park Jin-Woo
Park Jae-moon
LM
Lee Min-ji
Kim Ri-an
OY
Oh Yong
Head teacher
LH
Lee Hyun-so
Han Seung-jae
SJ
Shin Joon-hang
Lee Dong-min
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Comments
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xyzJun 22, 2026
8,5
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