Since the dissolution of Fenix, Daiji Igarashi continues to maintain peace with its successor, Bluebird. Meanwhile Hiromi Kadota is showing signs recovery according to Dr, Ichimura, who is a scientist at Bluebird specializing in genetic engineering. At the same time, a new organization known as Alicorn has surged, claiming to be the guardians of the new era without Giff. They began kidnapping and confining young boys and girls for a certain reason. Hiromi is one of the suspects who is claimed to have kidnapped one of the victims, Rumi, and is put on Bluebird's wanted list. However, he encounters a man with his face... Muramasa, who appears in front of Daiji and his friends who attempt to discover the truth. Daiji wavers before a new enemy and new "devil." Furthermore, he is betrayed by Kagero, who is supposed to share his body. The secrets that the kidnapped girl, Rumi, holds... just what connection to they have with Muramasa? The final tale that inherits the spirit of Kamen Rider Revice, which has for one long year told the tale of a buddy relationship... begins now!