This drama tells the story of a brother and sister whose father, Takashi, was killed while working as a policeman. Soon after, they learned that the prisoner was a cadre of Japan's largest special fraud organization, Phantom Beast%, and the two decided to avenge their father.His elder brother, Wataraze Kiichi, was a policeman and was full of justice and action. His younger sister, Wataraze Yuki, was an engineer at a national university and an excellent white hat hacker.The two used their respective specialties to infiltrate the organization and confront the evil.