Mi Yeong, who used to be considered the Major Crimes Unit’s top cop, is stationed behind a desk after having a baby. She leads uneventful yet peaceful days at handling civil complaints and looking after her son and unemployed husband at home. One day, an overly enthusiastic detective Ji Hye, is consigned to Mi Yeong’s team, and they bicker over every little thing from the moment they meet. In fact, they are sisters-is-law, and neither are happy about sitting next to each other all day in the same office. But differences are pushed aside when a woman who came to file a report gets run over in front of Mi Yeong and Ji Hye. They discover that the woman is the victim of ‘spy cam porn’ and has been threatened it would go up on a community site in 3 days. The two cops take the case to the relevant powers, but due to workload, no one can handle it in time. Ji Hye’s burning passion for justice rekindles Mi Yeong’s sense of duty, and the two decide to take matters into their own hands.