In a planet far away beyond the galaxy, 2 mysterious darkness warriors appears in front of Ultraman X and Ultraman Geed. On the other hand, Ultrawoman Grigio is training on Earth. All of a sudden, an Ultraman fell from the sky with another giant.
Ultraman Rosso and Ultraman Blu were called out fater Zero and Grigio was caught. At the same time on Planet O-50, Ultraman Orb is attacked by the Darkness Warriors.
Peguila is attacking harmless creatures in the galaxy. It is time for Ultraman Ribut - the Galaxy Rescue Force member - to save lives. On another planet, Ultraman Orb is having a hard time dealing with X Darkness and Geed Darkness.
Ultraman Rosso and Ultraman Blu are attacked. Ultraman X and Ultraman Geed are also exhausted from by their new enemy. The Ultras are facing a great crisis
After the invincible Ultraman Ginga joins the battle, the New Generation Heroes finally gather together. For the first time they learn the truth about Ultra Dark-Killer: an vicious enemy who has tortured the 6 Ultra Brothers in the past. What is his aim this time?
Ultra Dark-Killer declared war against the New Generation Heroes. There is little time left to save Ultraman Zero and Ultrawoman Grigio. It's time for the New Generation Heroes to unite and fight.
The battle between the New Generation Heroes and the League of Darkness finally begins. Will the Ultra Heroes be able to defeat Ultra Dark-Killer and save Grigio?
