Shiina is a secret investigator of the Special Investigation Bureau who deals with national secrets that never come out. Her younger brother was a researcher at a bioweapons research facility that was hidden by the government and was kidnapped by a terrorist organization. Shiina gets into the enemy hideout but is held hostage by her younger brother. Injected with a drug developed by her brother that amplifies her pleasure and facilitates her brainwashing, she ends up exposing her lewd figure in front of her brother...
