A mysterious power which has only just begun to emerge, and a battle between monsters is spreading across the galaxy. A new hero will emerge to fight against monsters for the first time.

In this universe, the monsters from the past are being gathered again. Monsters called the Devil Splinters are stirring chaos. These monsters are very strong and have an enormous amount of power. Many other monsters are gathered as well. They are called the new monsters of this universe.

The Ultraman Zero and his disciple Ultraman Z are chosen to fight the Devil Splinter, together with a hero called Ultra Warrior. In the face of great danger and in the midst of a battle. The two superheroes will fight to defeat this evil monster and restore peace to the galaxy.