ALIUS

It is revealed that Anna, who had been working alongside them, is actually an undercover agent for Public Security. Confronted by Sano, she discloses her true objective—a revelation that exposes the shocking reality of the police investigation surrounding "ALIUS," far exceeding anything they had imagined. Sano and Kanzaki are left speechless by the news. Yet, the identity of the serial killer and their true motives remain a mystery. Encouraged by Kanzaki's words, Sano resolves once more to uncover the truth behind the case.

A shocking truth came to light—one that even Kanzaki himself had not known. Yet, Sano resolved to trust Kanzaki and continue working alongside him; following a message left by Kaoru, the two headed to a specific facility. There, testimonies from Mamiya (Takashi Yamanaka) and Ashida (Osamu Kao) revealed the true purpose of "ALIUS LAB" and the reason Kaoru had left Sano. Eventually, Sano and Kanzaki closed in on the culprit's identity—but the killer's gun was already aimed at their target from behind.

The true culprit of the serial murders, Souma Sakaki (Kenta Inozuka), aims to assassinate Kaburagi (Hiroshi Okochi), the ringleader of Project Marionette, which plans to use ALIUS for military purposes. In order to prevent the final murder, Sano and Kanzaki rush to Kaburagi's lecture venue, where they finally confront Sakaki, who aims his gun at him for revenge. What is told there is the sad past of Sakaki, who was at the mercy of the nation's grand ambitions. In order to inherit the feelings of his late wife Kaoru and stop the chain of tragedies, Sano desperately tries to persuade him, but...