The story is set in a big hospital which is infiltrated and taken over by an armed group wearing devil masks. Musashi Saburo a police officer on leave of absence has to save the hostages within a set time limit.
- Other name: 大病院占拠,だいびょういんせんきょ,Dai Byouin Senkyo,This Hospital Is Like a Birdcage,Large Hospital Occupation,Occupation of a Large Hospital,Occupying a Large Hospital,Captured Hospital
- Genre: Detective, Drama, Investigation, Miniseries, Mystery, Suspense, Thriller
- Status: Ongoing
- Duration: N/A min
- Country: Japanese
- Network: N/A