Matsumiya Kana lost everything when her father was arrested and charged with embezzling funds from the Japanese Ministry of Defense. However, she soon learns that her father actually worked for a secret organization within the Department of Internal Affairs, and was in charge of embezzling money to support it off the books. He was being used by an "embezzlement group" within the secret organization, and that group is willing to kill to keep their activities quiet. The life of his daughter, Kana, is the perfect blackmail to ensure his silence. Within a corrupt agency, where anyone could be a traitor, will Kana be able to avoid falling into the hands of those plotting against her…?