Keyword Metropolitan Police Department

Graduating at the top of her class, elite detective candidate Jun Shibata is transferred to the section that handles cases deemed "unsolvable" by the department. Her partner, though a well-respected and experienced detective, has grown complacent after unsuccesfully pursuing these cases that many consider an exercise in futility. With her upper class breeding, her colleagues don't expect much from her either, but she suprises them all with her motivation and astounding powers of deduction. Well-constructed mysteries and colorful characters abound in this stylish and edgy police drama.

Keizoku is a Japanese mystery thriller created first as a TV drama and later as a film. It is about Detective Jun Shibata, who handles unsolved cases with her hardened partner Tōru Mayama. The television series was broadcast in eleven episodes between 8 January and 19 March 1999. A two-hour "special drama" was then broadcast on 24 December 1999. The series has been called "epoch-making" in the police procedural genre on Japanese television.