The Assassination Bureau has existed for decades (perhaps centuries) until Diana Rigg begins to investigate it. The high moral standing of the Bureau (only killing those who deserve it) is called into question by her. She puts out a contract for the Bureau to assassinate its leader on the eve of World War I.

After the assassination of Tokyo’s Governor by Yakuza members, the CIA bureau chief (William Atherton) for Tokyo puts out a call to an agent (Steven Seagal) that had been raised in Japan and trained by ex-Yakuza. Using his former ties, he quickly determines that a war is brewing between old-guard Yakuza members and a young, crazed leader (Takao Osawa) with ties to the Chinese Tong.