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.
Yoo Eun-ho, a single dad armed with perfection, becomes the secretary of Kang Ji-yun, the CEO of a popular headhunter company, who doesn't do anything except work.
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