"Project A-ko 2: Plot of the Daitokuji Financial Group" is the second installment in the "Project A-ko" series, continuing the adventures of A-ko Magami, B-ko Daitokuji, and C-ko Kotobuki. The story picks up after the events of the first film, with A-ko and B-ko still attending Graviton High School in the futuristic city of Graviton City. Their rivalry remains intense, fueled by B-ko's unrelenting jealousy over A-ko's close friendship with C-ko. However, their personal conflicts are overshadowed by a new external threat.

The Daitokuji Financial Group, a powerful and corrupt conglomerate led by B-ko's father, becomes the central focus of the plot. The group is revealed to be involved in illegal activities, including the development of advanced military technology and the exploitation of Graviton City's resources. B-ko, initially unaware of her father's schemes, is drawn into the conflict when she discovers the true nature of the family business. Her internal struggle between loyalty to her family and her growing sense of morality becomes a key theme.

A-ko, with her superhuman strength and determination, takes it upon herself to confront the Daitokuji Financial Group and protect her friends. C-ko, though often portrayed as naive and carefree, plays a crucial role in the story, inadvertently triggering key events due to her unique connection to the city's mysterious energy source. The narrative weaves together action, comedy, and science fiction elements, as the trio faces off against the group's advanced weaponry and robotic forces.

The climax involves a high-stakes battle within the Daitokuji Financial Group's headquarters, where A-ko and B-ko must put aside their differences to combat the true antagonist: B-ko's father, who has unleashed a massive mecha to maintain control over the city. The resolution sees the group's operations disrupted, though the broader implications of their actions remain unresolved, leaving room for further developments in the series. The film maintains the energetic tone and dynamic character interactions established in the first installment, while expanding the scope of the conflict to include larger societal and ethical questions.