Na década de 1970, a Coréia está sob o controle absoluto do presidente Park, que controla a KCIA, a organização com vantagem sobre qualquer ramo do governo.
Once a legendary detective and a new mom, Mi-young, now works a desk job. But when overenthusiastic newbie Ji-hye is assigned to Mi-young's civil complaints team, the two female cops get caught up in a serious criminal case that triggers an action-filled comedic investigation.
