The newest BankiJyu, Vacuum Banki, is dispatched to take down the Sut? siblings. Meanwhile, Miu, curious about what makes the Go-ongers "pathetic," drops in on the still-depressed Go-ongers. She treats the gang to a meal at a fancy restaurant and takes them clothes shopping, in an effort to make them less "pathetic." S?suke and Miu butt heads the whole time, and she decides that she needs to work on him some more. S?suke refuses to follow Miu's plan and eventually deserts her. Meanwhile, Vacuum Banki's attempts to take out Hiroto are repeatedly unsuccessful, thanks to Hiroto's vigilance, so he is instructed to go after Miu instead. Hiroto senses that Miu is in danger, and rushes to find her. He runs into S?suke, who tells him that Vacuum Banki has kidnapped Miu and taken her to Mt. Kurogane. Hiroto changes into Go-On Gold and tells S?suke not to interfere before flying away. At Mt. Kurogane, where Miu has been tied up, Vacuum Banki demands Go-On Gold's Wing Trigger as ransom. As Hiroto agonizes over whether he should comply, S?suke arrives, offering his Go-Phone and Change Soul to Vacuum Banki and demanding to take Miu's place. Vacuum Banki gleefully takes S?suke's equipment, but refuses to release Miu. S?suke, enraged, attacks Vacuum Banki, buying Hiroto time to change Go-on Gold and rescue Miu, who watches S?suke reclaim all of their transformation gear. Together, Go-On Red, Go-On Gold, and Go-On Silver defeat Vacuum Banki using the Mantan Gun and the Wing Boosters. Vacuum Banki undergoes Industrial Revolution just as GunBir-Oh, BearRV, and Bus-on arrive. Speedor is transported to Go-on Red, and Engine-Oh is formed. Vacuum Banki, however, puts up a formidable fight against GunBir-Oh and Engine-Oh. Toripter and Jetoras join the fight and are convinced to join with Engine-Oh to form Engine-Oh Jetripter, who easily scraps Vacuum Banki.