As the G-team had feared might come to pass, Katze's show of chaos and destruction has begun. Spurred by Katze, many Crowds users launch an attack on Kasumigaseki and deals a devastating blow. The Prime Minister is forced to evacuate to an emergency relocation center in Tachikawa. With Rui under their protection and the Crowds going on a rampage, the G-team members discuss how to proceed...

At Hajime's suggestion, the G team decides to go on a PR campaign. Their first stop is a local preschool, where they transform in front of preschoolers and the press, and attempt to inform the public about the dangers of Berg-Katze. Meanwhile, Katze approaches Umeda, a former Hundred member who had been expelled, and sets events in motion in order to bring the world down in flames.

Determined to defeat Katze, Rui and the Hundred face Katze together. Katze merely howls with laughter and takes on a monstrous form. Rui realizes that he had severely underestimated Katze's true power. When Hajime and the others arrive, Katze vanishes after making cryptic remarks, which leads Hajime to devise an unconventional strategy...

Hajime's actions has made the public go into a frenzy, while infuriating Paiman and exasperating her team mates. However, Hajime is indifferent to the uproar and continues to march to the beat of her own drum. Just then, an invitation from an individual identifying himself as LOAD.

A difficult decision by Rui gives rise to dissenters among his followers. Hajime, Sugane, Jou, and Utsutsu happen to be present when a major accident occurs with numerous casualties. As people rush to resolve the crisis using the power of GALAX, Hajime has her fateful encounter with a mysterious being involved in the rescue operation, as well as the beautiful individual directing its efforts.

Although GALAX's utility is gaining widespread recognition among the people, Rui is beset by his desire to accelerate the world through more direct means. Meanwhile, the G team members find themselves divided over how to deal with the new threat. Even as they struggle to find common ground, the mysterious phantom instigates a vicious crime in front of Rui, forcing him to see people getting hurt.

Ninomiya Rui is a genius who built GALAX, the social networking service powerhouse, and General X, an AI. Rui seeks to update the world by intervening in a broad range of issues. He empowers the people to resolve them by using General X's ability to gather intelligence and match human resources. One day, however, he is faced with a challenge beyond the scope of anyone's abilities, and is forced to consider using a forbidden power...

Sugane is irked by the fact that Hajime has interfered with his attack on MESS, despite the unidentified object being a G-team target for elimination. That hardly stops Hajime from continuing to push Sugane out of his comfort zone by cheerfully going against his expectations and assumptions.

Gatchaman are secret agents who have been empowered by aliens possessing advanced technology in order to neutralize alien criminals and unidentified objects harmful to mankind. In the summer of 2015, the Tachikawa CAGE G-team welcomes Ichinose Hajime to their ranks. A high school student who loves stationery, her free-spirited, offbeat personality is a breath of fresh air to the mission-plagued G-team.