In the recently established Shiniki district of Tokyo, Zen Seizaki, a dedicated public prosecutor at the Tokyo District Public Prosecutors Office, delves into a case centered on false advertising. Teamed up with his assistant, Atsuhiko Fumio, they target Japan Supiri, a pharmaceutical firm accused of falsifying clinical data on a new medication. During their inquiry into Shin Inaba, a linked anesthesiologist, the investigation takes a grim twist when Zen uncovers a disturbing page marked with a cryptic 'F' amidst blood, hair, and skin residue. As Zen delves deeper, the case evolves into a labyrinth of deceit and complexity, testing his principles and perception of truth. Unraveling the threads, Zen stumbles upon a hidden scheme intertwining the mayoral race, influential figures, and a mysterious woman entwined with the establishment of Shiniki. The stakes heighten as corruption and treachery engulf Zen, thrusting him into an unexpected maelstrom of political malice and enigma.