Nao Eikawa, the daughter of an investigator searching for new illegal drugs, goes missing while searching for her father's whereabouts in an organization's hideout. She is specially appointed as a special investigator to track down her father's disappearance. One day, she encounters a drug deal and captures an executive of the organization, but he is released due to insufficient evidence. Nao secretly tails the man and infiltrates the hideout alone, but her father, who has been drugged, is taken hostage, leaving her captured as well!
