Miran, a daughter who can't speak because of the shock of witnessing her father's murder, vows revenge on the international drug organization Yongdeng faction. She is reunited with her estranged sister Mishuku, and they part ways. The Black Dragon Society led by Lee of the Yongdeng Faction vs. the runaway group Night Raid led by Mishukul. The killing machine, Maya vs. Miran. What is going through Miran's mind as she takes revenge despite the loss of her friends?

Focusing on the search for Sayaka, a young girl whose mother has recently died. Sayaka’s father, an undercover F.B.I. agent, has had a rough relationship with his daughter since the death of her mother and feels that her kidnapping by the evil Neo-Guild is his fault. Sayaka has been angry at her father because he was away in America while her mother died, leaving her feeling abandoned. Aiding Sayaka's father in the search is Tokusou Robo Janperson! The two don’t get along at first, but things between them go smoother as they continue the search.