After receiving a modified Vail Driver from George, Genta intends to settle the score with a weakened Vail by transforming into Kamen Rider Destream and facing the demon in combat. Meanwhile, Sakura attempts to stop Daiji's rampage as Ikki and Vice fight against Akaishi.

While Hikaru successfully defeats Akaishi and avenges Kimiko and Tasuke, he is unable to kill him due to the Over Demons system taking a heavy toll on him. To Ikki and his allies' shock, Daiji kills Akaishi to take over his role of protecting Giff. Vice manages to prevent Daiji from forming a pact with Giff, who banishes Vice to the latter's dimension. In the hopes of reviving Kagero and restoring Daiji's balance, Hiromi is forced to temporarily reassume the mantle of Kamen Rider Demons despite his condition. Meanwhile, Masumi's condition worsens after resealing Vail in the Demons Driver and transfusing his inner demon to George.