Shiina, a secret investigator for a special investigation bureau dealing with incidents that are never revealed due to state secrets. Her brother is a researcher at a bioweapons research facility that the government has been concealing and is kidnapped by a terrorist organization. Despite storming the enemy's hideout, Shiina ends up being restrained and taken hostage with her brother. She is injected with a drug developed by her brother that amplifies pleasure and makes brainwashing easier, forcing her to expose her lewd form in front of him...
