Alto Saotome unexpectedly meets Ranka Lee and Sheryl Nome again at an observation park. However, the Vajra also shows up in the skies above the three, so they immediately head to the park's emergency shelter and get trapped inside.

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.