The background to and depiction of a watershed battle in Japanese history, at Sekigahara in 1600, when Tokugawa Ieyasu's Army of the East defeated the Army of the West of Ishida Mitsunari. The story includes the intrigues and shifting loyalties of the various retainers, family members, and samurai.
The body of Kou Fujisaki, who fell to her death, is discovered in front of an old building in West Shinjuku. Chief Sakamoto notifies Ushio, who arrives at the scene. Ushio thinks that this must be a murder, but according to Yamaji, who was at the scene before him, an eyewitness testified that Kou had jumped off the roof of the building, killing herself. Kou is someone who has lingered in Ushio's memory - as a suspect...
Donoue General Hospital runs into a budget deficit, even though the doctors drive expensive imported cars and live an outlandish lifestyle. Office manager Momoi finds surgeon Kosuke Sagara through a medical website. Kosuke Sagara arrives at the hospital and tells the director of the general hospital to decide on his pay after watching his work. Kosuke Sagara informs the hospital that he had previously quit his job at a university hospital and taken a year sabbatical.
Kindaichi Hajime is a high school student and a private detective with an IQ of 180. He solves murder cases that are riddled with difficult clues. Kindaichi Hajime works with his childhood friend Nanase Miyuki and Kenmochi Isamu. Kenmochi Isamu is now the chief inspector of the Tokyo Metropolitan Police Department.
Takeshi Hongo is a promising young man with a passion for motorcycle racing. However, his dreams are suddenly ruined when he gets kidnapped by Shocker, the evil secret organization planning to dominate the world. After being remodeled into a cyborg, Takeshi escapes and swears to protect the world from the inhuman monsters.