On November 24, 2003, soon after police had closed down the Rainbow Bridge to apprehend the perpetrators of the “Daiba serial murder case,” police “negotiator” Mashita (Yusuke Santa Maria) found himself surrounded by reporters outside the Bayside Police Department. “Well, yes, I’ve been getting a lot of attention as the department’s first official negotiator….” was Mashita response to a reporter’s question. One year later, that remark would come back to haunt him, embroiling he and all of Tokyo in a subway crisis of potentially disastrous proportions.
Tokyo, Dec. 24, 2004. Christmas Eve. As dusk falls, the crush of commuters mounts. Not a good time for all the city’s subways to stop running. Suddenly, the Metropolitan Police Department is faced with perhaps their biggest crisis ever. Somebody has hijacked the “Spider E4-600,” a state-of-the-art prototype super train, and is remotely controlling it via the Internet to run rampant through the massive web of underground railways that lies beneath Tokyo. Police Superintendent Muroi (Toshiro Yanagiba) summons negotiator, Mashita, who is told, to his horror, that the mystery train jacker, who goes by the name of “Dangan (Bullet) Liner,” has named Mashita personally to “come out and play on the trains.”
台場会社役員連続殺人事件の翌年（2004年との設定）のクリスマスイブの午後。大混雑している東京の地下鉄で、地下鉄運営会社・東京トランスポーテーションレールウェイ（TTR）の最新鋭試験車両クモE4-600（通称『クモ』）が、何者かに乗っ取られて地下鉄網を暴走し始めた。
警視庁は緊急対策会議を招集、第1級テロの可能性ありと見た捜査第一課の室井慎次管理官（警視正）は、緊急対応メンバーの招集を指示、その司令塔として日本初の犯罪交渉人（ネゴシエーター）、真下正義交渉課準備室課長（警視）率いる刑事部交渉課準備室CICチームを、TTR総合司令室へ急行するよう命じた。
