With Genta surviving a cell transfusion surgery, the Karizakis create the Giffard Rex Vistamp, which Ikki and Vice use to become Kamen Rider Ultimate Revice and give humanity hope and inspire citizens to either join Weekend in fighting Giff's tyranny or build shelters across the city. Furious, Akaishi begins his plot to invade Weekend's base. Meanwhile, Daiji leads a demon army to the resistance's base by forcing civilian's move to ARARAT and obey Giff orders, sparking a fierce conflict between Daiji and his siblings.