Ep. 1: O promotor Seizaki descobre um documento manchado de sangue marcado com F durante uma investigação sobre um escândalo farmacêutico.

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While investigating a scandal involving a pharmaceutical company, Zen Seizaki, a public prosecutor from the Tokyo District Public Prosecutors Office Special Investigations Team, discovers an unusual document covered in bloodstains with the letter F written all over it. Seizaki pays a visit to one of the witnesses in the investigation, but stumbles across an unbelievable situation.