Kozono Yohei, secretary general of Shoto University, was found stabbed to death in his home. Hoshino Naoto, a detective at Fujimi Police Station, rushes to the scene and sees the scene of the murder in the living room. Tanimura Kaho, a lecturer at Shoto University's Department of International Studies, is trying to get ahead in life at any cost, and has been having an affair with Kozono, who holds the right to personnel affairs, for half a year. Kozono is murdered, and Kaho is arrested as a murderer. On the other hand, reporter Maruyama Sota receives information about the affair via anonymous email, and realizes that someone is trying to manipulate the impression of the incident, and begins his own investigation. In the midst of this, Hoshino feels uncomfortable with the investigative policy of the upper-level police, which concludes that Kaho is the culprit in a half-baked investigation, and eventually realizes that Kaho may have been framed by someone.

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