Yapool has returned after being injured in Ultraman Ginga S. He masterminds several attacks on Shou's homeworld, the Victorian kingdom in an attempt to get to the Victorium Core. Ultraman Hikari appears and grants Shou the ability to transform into Knight Mode with the Knight Timbre. Now free from their Spark Doll forms, the Showa Ultras join Victory in his fight.

After thousands of years, a diabolical space emperor named Juda Spectre is about to break free from his dimensional prison! In order to prevent this disaster from happening, and to save the Galaxy, Earth's amazing superhero ULTRAMAN VICTORY must use a new secret weapon, a combination sword and flute called the Knight Timbre! However, can the soundwave strength of our Ultraman's Knight Timbre stop Spectre and his army of monsters before it's too late?!—William Winckler