Detective Jae-in goes undercover
in a high school to protect a gangster’s daughter, Seung-hee, and gather intel.
She befriends Seung-hee and falls for classmate No-young, who turns out to be another undercover agent.
After a series of confrontations involving rival gangs, a corrupt undercover teacher (who harmed Jae-in’s uncle),
and Cha Young-jae’s capture, Jae-in and No-young reconcile on a future mission.
