"Girls und Panzer der Film" is a direct sequel to the 2012 anime series "Girls und Panzer," continuing the story of Ooarai Girls' Academy and its tankery team. The film is set shortly after the events of the series, where Ooarai has successfully defended its tankery program from closure by winning the national Sensha-dō tournament. However, the victory comes with a new challenge: the Ministry of Education demands repayment for the costs incurred during the tournament. To raise the necessary funds, Ooarai's student council organizes a exhibition match against a university-level team, led by the formidable Alice Shimada.

The narrative centers on Miho Nishizumi, the protagonist and commander of Ooarai's tankery team, as she leads her teammates in preparing for the high-stakes match. The university team, composed of highly skilled and experienced players, presents a significant threat, employing advanced tactics and superior equipment. The film explores the dynamics within Ooarai's team as they strategize and adapt to overcome their opponents. Key characters, such as the resourceful Yukari Akiyama, the determined Saori Takebe, and the stoic Hana Isuzu, play pivotal roles in the team's efforts.

The exhibition match itself is the film's centerpiece, featuring intense tank battles that showcase a blend of tactical ingenuity and teamwork. The Ooarai team must rely on their unique strengths and unconventional strategies to counter the university team's overwhelming advantage. The film also delves into Miho's personal growth as a leader, highlighting her ability to inspire and unite her teammates under pressure. Themes of perseverance, camaraderie, and the value of unconventional thinking are woven throughout the narrative.

In addition to the main plot, the film introduces new characters, including Alice Shimada and her team, who serve as both rivals and foils to Ooarai. The interactions between the teams add depth to the story, emphasizing the contrast between their approaches to tankery. The film maintains a balance between action and character development, ensuring that the emotional stakes remain high throughout. By the conclusion, Ooarai's determination and ingenuity are put to the ultimate test, culminating in a climactic battle that resolves the central conflict while leaving room for future developments in the series.