- Written by Riku SanjoDirected by Kyohei Yamaguchi
Ever since last month, 8 women had lost their money from their bank accounts. At first, the case is dismissed as a fraud case until all of the victims were hospitalized in comatose state and for some reason, they would awaken and go crazy. All of the victims were clients to an entrepreneur Shu Amagi (the man that Shinnosuke, Genpachiro and Detective Misaki tracked earlier), who runs a popular matchmaking service called Lover's Castle. Despite this, no evidence has been found proving Shu to be a Roidmude. At the same time, Jun takes a day off to strengthen relations with his daughter after a small family issue.
While Shinnosuke, Kiriko and Mr. Belt notice that Rinna is acting very suspiciously, Go dashes in and reveals an interesting piece of information: members of Lover's Castle hold a huge ceremony each month, with the next one going to be held the next day. After getting Shu to let them join in the ceremony, Shinnosuke and Kiriko drive out when Chase jumped in front of Tridoron and battles Shinnosuke. Even with Mach's assistance, the two were easily outmatched. Heart appeared, as Mr. Belt expressed his anger for turning Proto-Zero into a killing machine but Chaser thought it as "freedom" from being used as humanity's tool. Just as Heart was about to transform, Deco Traveller comes in and keeps Chaser busy for the Riders to escape.
Brain gives Heart the data for the Special Investigation Unit, suspecting that one of them is Drive and plots to eliminate and/or expose his human identity. But with none of his comrades agreeing with his plan, he gets pretty nervous until Heart calms him. Meanwhile, Kiriko is testing out modified bullets that can penetrate Roidmude skin, along with boots that have similar kicking powers to Drive's, both developed by Rinna. Rinna quickly fled away, leaving the Shift Dead Heat (a new Shift Car/Signal Bike hybrid) that Prof. Harley ordered her to finish incomplete.
Detective Misaki furiously coerced the whole Unit to investigate Lover's Castle when a metal spoon dropped, making her crazy which made her comatose and hospitalized. Genpachiro deduced that all the earlier victims turned crazy after hearing a metallic sound. While the party at the Lover's Castle began, Kiriko and Shinnosuke followed the act to find their "partner". Shinnosuke met a woman, who was surprisingly revealed to be Rinna. Both of them reacted in shock, with Rinna running away while Shinnosuke tries to explain the situation.
While searching for clues, Kiriko hears a voice leading her to Chase. But as she speaks his name, "Chase" wondered why she would mention the Grim Reaper, exposing his true identity, the Voice Roidmude. She used her special boots to attack Voice, with the sound of her gun loud enough for Shinnosuke and Go to come for her.
Shinnosuke explained that Voice/Shu Amagi hypnotized women with his hypnotic voice to make them see him as their ideal man while taking advantage of this to rob their money. Anyone who is affected by his voice would be sensitive to metal clattering sounds, with Detective Misaki being one of the victims affected. The reason why Kiriko was not affected as much was because she was wearing ear plugs. Despite it seeming easy for Mach Kikern to handle Voice alone, but when two other Roidmudes join him, Shinnosuke/Drive assists Mach in the battle. Before Mach could destroy Voice, Heart, having reached his Dead Zone, arrives and overpowers Mach. Drive had no choice but to summon the unfinished Shift Dead Heat and assume Type Dead Heat, knowing the risk that he would likely become like Heart. Using this form, he surpassed Heart and throws Voice into a wall. After that, he finishes Roidmude 046 and 085 while unaware of Voice's escape. After the battle, Type Dead Heat becomes haywire which causes Drive to enter Dead Zone and go out of control, as Shinnosuke begs Mach to stop him.
Elsewhere, Rinna falls victim to Voice's ability, and sees a young man, seemingly from her past, staggering and clutching his chest in pain. She walks forward, oblivious to the danger she is putting herself in...
- Battle Butler: Both of Voice's Roidmude companions are this in their human form.
- Chekhov's Gun: The ear plugs that Kiriko wore while testing the new Anti-Roidmude bullets is what allows her to resist Voice's powers.
- Dating Service Disaster: While going to the secret dating event, Shinnosuke approaches his designated date, sheepishly apologizing for making her wait. Then he notices he's meeting up with Rinna.
- Jurisdiction Friction: Misato from the 2nd Division unexpectedly demands that the Special Unit will drop the case, despite it being explicitly in their jurisdiction. Justified in that her behavior was the result of Voice's power affecting her.
- Megaton Punch: Drive Dead Heat punches Heart through a mountain.
- Nice Job Breaking It, Hero: Shinnosuke figures out early on that Voice affects victims through their hearing, and warns Kiriko ahead of time - but meets up with Rinna and forgets to tell her, leaving her vulnerable.
- Stuff Blowing Up: The pyrotechnics team is really going all-out as Shinnosuke transforms into Type Dead Heat for the first time.
- Tempting Fate: When Mach is trouncing Voice around, Shinnosuke notes that at this rate he won't have a chance to step in. Just as he says it, Voice's Battle Butler duo comes in, forcing him to get into his top gear. He immediately curses his big mouth.
- Villainous Rescue: Just as Mach is about to give Voice a proper amount of Full Throttle to the face, Heart
edits in and catches Gou's Rider Kick with one hand. - Why Don't You Just Shoot Him?: Brain proposes that they should hunt down the Special Unit, since he suspects them to have a direct connection to Drive. Heart, Chase, and Medic all chastise him for such a petty and cowardly solution, since killing the Kamen Rider as a human wouldn't amount to much.
- The Roidmude Count: 83The Answer: She wants to get married and she didn't finish Dead Heat.
