在这部潜入兄妹 特殊诈欺特命搜查官剧情片中,本剧讲述了兄妹俩的父亲贵司作为警察在工作中被人杀害，不久后，他们得知犯人是日本最大级别的特殊诈骗组织“幻兽”的干部后，两人决定为父报仇。哥哥渡良濑贵一曾是警察，充满正义感和行动力，妹妹渡良濑优贵是国立大学的工程师，也是优秀的白帽黑客。两人利用各自的特长潜入组织，与巨恶对峙。
Kiichi (Ryo Ryusei) is a former policer officer and his younger sister Yuki (Rikako Yagi) is a genius white hat hacker. 5 years ago, their father Takashi, who worked as a police officer, was murdered by an unknown person in front of them. They had already lost their mother at an early age and their father Takashi raised them by himself. He was the most precious person in their lives. After their father's death, Kiichi quit his job as a police officer and chased after his father's killer with his younger sister. But, they didn't have any clues on the identity of their father's killer except that he had a phoenix tattoo on the back of his hand. Now, Kiichi and Yuki finally get into a criminal organization, which is the largest fraud group in Japan. At the top of the criminal organization is someone named Phoenix. They try to get close to this mysterious person.
