Sergeant Kuroi Maya arrives at the Violent Crimes Investigation Section of Kawasaki Aozora Police Precinct's Criminal Affairs Division. Soon after she takes up her new post, she digs up and exposes the past of a criminal who has besieged a building and taken hostages and solves the case in the blink of an eye. Maya is a beautiful yet sadistic detective who excels at checking out information on others and using it as a weapon to corner the enemy.