19 years ago Chou-san’s fruitless obsession with the Kambe Sayuri murder began. But Daisuke actually witnessed his father killing as a lad. Far from joining the force to protect the Kambe family and its interests, Daisuke is as eager for answers about the murder—and his fathers suicide—as Chou-san.
Haru, who has basically been swept up in all this by Chou-san and Daisuke, thus becomes a willing member of their re-investigation team. While he’s initially tasked with what appears to be busy work—poring through piles of family files, it’s clear Daisuke is counting on Haru’s detective’s instincts to find something.
Meanwhile, Chou-san is served weird rich people food while he conducts an interrogation of Takei in a secure location within the Kambe residence, offering Takei expensive whisky as no sake is available. Unfortunately, Takei seems too scared to say anything more than they learned with the VR machine.
Daisuke’s grandma similarly stonewalls his efforts to acquire any further information about his parents’ deaths and the “third laboratory” where they both worked and where the mysterious Adollium was researched—a lab now suspiciously missing from the Kambe org chart.
When Suzue tries to bypass an uncooperative HEUSC by basically scouring the internet for mentions of Kambe’s father and the lab, an informational page suddenly shoots a 404 error and the remaining search results are suddenly reduced to zero before her eyes.
She clandestinely informs Daisuke that not only is HEUSC refusing any questioning, it’s now actively working against them, using their own voices and body language to keep them one step behind. She does this by taking a very confused Daisuke by the hand, throwing him on the bed, and covering the two of them with the sheet.
When Haru sees them slightly disheveled, there’s a whole lot he could say considering Daisuke told him Suzue is related to him; but more importantly, he’s found a clue in a photo of Daisuke and his folks that indicates a mountain summer mansion was the location of the Third Lab.
Daisuke and Haru head to the lab, with the latter serving as a auto-missile-chucking diversion so the former can infiltrate the lab. It’s good to see the two working side by side on the same case again, even if Haru was left in the dark about the exact nature of the heavy pack on his back.
As Daisuke gains access to the lab, Suzue reports an intruder back at the residence, who is having success breaking her firewalls in order to gain access to Takei’s cell. Stranger still, the computer identifies the intruder as Kambe Shigemaru, Daisuke’s dad. When the power to her control center is knocked out, she heads off the intruder, only to be knocked out cold.
The intruder than enters the cell, but despite being given an emergency escape route, Chou-san has no intention of crawling to safety like a rat. After one last drink of expensive liquor, he takes out his handcuffs and prepares to confront the knife-wielding intruder head on, and Takei stands beside him. It doesn’t go well.
So, things are a bit clearer now: Daisuke’s dad never committed suicide, but his death (and dental records) were faked…perhaps so he could continue his work without further interference. His wife clearly expressed moral and ethical objections about that work, but they were ignored. It’s possible Shigemaru snapped when Sayuri left him, and he certainly remains snapped to be able to slash two detectives to ribbons.
That said, there must be a method to his madness. He could be behind HEUSC working against Daisuke and Suzue, and he clearly exhibited the faculties to infiltrate the highly secure residence and its network. Whatever the state of his mind (and, incidentally, his research), Haru blames Daisuke for not coming to the doomed detectives’ aid sooner.
That said, Daisuke did give Chou-san an out from the start, but he made his choice (as did Takei). Chou called the Kambe Sayuri case his “life”, but now the case has outlived him. Here’s hoping his and Takei’s sacrifice wasn’t in vain, and Daisuke and Haru will be able to complete Chou-san’s 19-year search for the truth…and for justice.