Kiriko reports to Shinnosuke of another case, where they are tasked to scan Heavy Acceleration particles at the Metropolitan Police Forensic Science Lab.
Forensic Technician Mariko Minowa (a fan of Shinnosuke/Kamen Rider Drive) reports that while she was eating at the lab, a Heavy Acceleration wave was released and several files had been stolen though she had no idea of whom it belonged to.
As revealed by Genpachiro, Shizuo Shigeta, the head of forensics lab physical department had been reported missing a few weeks ago.
Kiriko suspects him as a host for the Fusion Evolution State but Mariko denies it, knowing him as an honest person.
Witnessing one of the files that dropped by Thief Roidmude, Shinnosuke realizes that the cases are the ones that related to his father's death from 12 years ago.
Shinnosuke remembers the gun that killed his father may have a piece of evidence, and Nira gives him a list of facilities that used by Makage and theorizes that one of them may be secretly affiliated to him.
He demonstrates his Super Heavy Acceleration ability, with Shift Deadheat and Formula come to rescue Kiriko and Drive.
At the Unit's office, Honganji presents Shinnosuke, Kiriko and Nira a new batch of antidotes manufactured by Rinna.
He was the only one knew which facility Shinnosuke and Kiriko were after and they put up an act to track him with the antidote bottle that placed with a tracker.
He and Nira entered the bank in disguise of ordinary customers and when the robbery happened, Eisuke covered a little girl when she cried.
Itsuro Negishi eas just pointing his gun to Eisuke and when his acquaintance, Maruya stepped back, Nira secretly knocked him.