AIBOU: The Movie IV

A former TV presenter is murdered. On the same day, two police officers from the Metropolitan police Special Mission Task Force, Sugishita Ukyo (Yutaka Mizutani) and Kameyama Kaoru (Yasufumi Terawaki), are guarding a female Diet member, Katayama Hinako (Yoshino Kimura). The pair identifies explosives and saves her life. From the clues left at the scene, Sugishita builds up his case and finds a connection between the murder of the TV presenter and the attempted murder of the Diet member. During a painstaking investigation, the savage murder case of a young overseas volunteer five years earlier emerges in the background, and the pair prevents indiscriminate murder at the Tokyo Big City Marathon event by suppressing the perpetrator.

The kidnapping of some chiefs of police by a rogue ex-policeman is just the beginning for a much much bigger story that it seems at first sight.

A news report circulates about a man who died after being kicked by a horse on a small island located 300km away from Tokyo. National Police Agency director Takeru Kanbe assigns Vice Director Mineaki Kai the task of making sure rumors surrounding the incident are fully investigated. Soon, partners Ukyo Sugishita and Tooru Kai are dispatched to the island to conduct the investigation. When Ukyo and Tooru arrive on the island, which is privately owned by a wealthy businessman, they discover a unit of former Self-Defense Forces personnel who have set up a small community as they participate in training exercises. While Ukyo initially expected to be investigating an accidental death, he quickly becomes convinced it was actually murder. However, when they finally manage to uncover conclusive evidence of this, the soldiers attack.