In Tokyo, a bustling metropolis, supernatural creatures including elves, dwarves, and vampires live in harmony with humans. But this was not always the case. Power used to be in the hands of mighty dragons, but they vanished, and their disappearance paved the way for a malevolent group known as "Nine." The squad's goal is to uncover the secrets of the divine dragons, causing mayhem and destruction wherever they go. Responding to the threat, the police department assembles a team of experts possessing extraordinary abilities beyond those of regular humans, known as the Special 7. In the course of a hostage situation turned violent bank robbery, Seiji Nanatsuki, an ambitious detective, meets Shiori Ichinose, a high-ranking member of the elite team. Seiji's virtue and sense of justice earn him a sought-after position among the Special 7. Nevertheless, he swiftly realizes that the job is more complicated than he thought. He is thrown into unpredictable situations and must adjust to working with different supernatural beings and diverse personalities. Despite Nine's destructive plans and the rampant crime in the city, Seiji and his team are committed to resolving unusual cases and thwarting Nine's dangerous agenda.