Sometime after the Ultraman Ginga S: Showdown! Ultra 10 Warriors!!, Show and Sakuya returned to the Victorian Kingdom during their break from working with the UPG. Their reunion with Lepi were short-lived when the party were dragged underground by the monster Aribunta and its master, Yapool, whom steals the Victorium Core. While Show as Ultraman Victory was left powerless to stop Aribunta, a blue Ultraman named Ultraman Hikari saved him, granting the Knight Timbre, which allows Victory to achieve a new form called Ultraman Victory Knight and finishes Aribunta. As Hikari narrates, in tens of thousands years, the Space Emperor revives himself through a space distortion that can be felt from the whole galaxy. Ultraman King sent three Ultramen, Ultraman Ace, Ultraman Leo and Astra to stop him. Hikari invented the Knight Timbre as means to seal the Emperor’s darkness.