Ao is one day away from starting middle school when his world begins to change. Scub Coral activity leads to Scub Bursts and mysterious G-Monsters. And when he picks up an odd bracelet, he finds himself drawn even deeper into these events.

Fiercely adamant about not relinquishing the bracelet, Ao finds himself trying to pilot the Japan Armed Forces' military Flying Platform to fight the G-Monster and defend the island.

Ao has always faced discrimination as a foreigner, but his newly revealed blue hair and involvement in the recent crisis spur the islanders to take action against him. And in the process, Ao learns more about his mother.

With renewed resolve to fight to protect the island, Ao takes on the G-Monster with some help. And in the aftermath, Ao begins to learn that the world is more complicated than he had thought.

Having thrown in his lot with Generation Bleu, Ao returns with Team Pied Piper to their headquarters in Switzerland. There, he finds himself out of his element and struggling to figure out how he fits in to their plans.

Ao gets a taste of what it's like to be part of a real mission and a better sense of just how high the stakes are. Meanwhile, strange things are happening around the world, apparently driven by one mysterious individual.