A long time ago, a great evil tried to conquer the galaxy. The leader of the Aether world handpicked various fighters and warriors from a variety of dimensions and trained them on how to defend their home-worlds from the dark forces swarming the galaxy. The warriors stormed the enemy's castle in the dark side of the universe, freed the prisoners within and subdued the evil leader of the dark forces. During the battle, the chosen ones, remembered by the residents of the worlds saved from the darkness.

 They implored the stars to help them and lend the heroes their power. The fighters were about to give up the fight for their homes and the universe until the constellations and planets in the sky shone with brilliance. They shot out light rays to these warriors and gave them their power. The warriors then transformed into the Crusaders, who used their newfound skills to defeat the villain threatening to conquer the worlds finally. They went to the Aether world to continue fighting evil and training recruits to defend the dimensions from evil.

Now, the same evil defeated by the Crusaders of the Constellations is stirring from its sleep, while its followers are plotting to make it rise...the Crusaders, and the other warrior groups must work together to ensure that it must be stopped again.