She's on Duty

Undercover cop Jae In has just been assigned to the most dangerous assignment of her career — she's going back to high school! Mob boss Bae Du Sang is about to have a nervous breakdown trying to find his former partner Cha Young Jae, who has apparently changed his ways and is a possible target for the prosecutors in a case against Bae. Word on the street is that Cha is hiding out, and the only way to find him is through his only sibling — his teen daughter Seung Hee.