A human space colony fleet is trying to find a habitable planet near the center of the Milky Way Galaxy. The story focuses on three young adults and the events that occur around them as the fleet faces a crisis of alien origin.
After arriving at the planet of origin of the Vajra, the Frontier fleet commences an all-out attack and Battle Frontier manages to charge directly into the center of the enemy forces. However, Island One (the main residential area of the fleet) receives a fierce counterattack from the Vajra and becomes endangered. During that time of crisis, the silhouette of a person starts projecting on the stage at the Battle 25 bridge.