Saya, who works with her husband at the Metropolitan Police Security Investigation Division, encounters a groping incident herself while investigating a series of such incidents on a train and lets the main culprit escape. Saya is disheartened by her own blunder in letting the suspect get away. However, as she interrogates the man she caught, it becomes clear that this is not just a simple groping case, and Saya launches another investigation into the groping gang. Finally, Saya tracks down the organization's headquarters, but inside, men are waiting with guns, holding her husband hostage…
