"Gekijō-ban Haikyu!! Owari to Hajimari" is a two-part anime film series that adapts the final arcs of the "Haikyu!!" manga, focusing on the journey of Karasuno High School's volleyball team as they compete in the Spring High National Tournament. The narrative centers on the team's growth, camaraderie, and determination to overcome formidable opponents, culminating in their pursuit of the national championship.

The first part, "Owari" (The End), chronicles Karasuno's intense matches in the tournament, highlighting their strategic gameplay and the individual development of key players. Shoyo Hinata, the team's energetic and undersized middle blocker, continues to refine his skills alongside his rival and setter, Tobio Kageyama. Their dynamic partnership, often referred to as the "Freak Quick," becomes a cornerstone of Karasuno's strategy. The team faces off against powerhouse schools, including Inarizaki High, whose star player, Atsumu Miya, presents a significant challenge. The matches are characterized by high-stakes rallies, tactical adjustments, and emotional moments that underscore the players' dedication to the sport.

The second part, "Hajimari" (The Beginning), shifts focus to the aftermath of the tournament and the future of the characters. It explores the impact of the competition on the team members, both as athletes and individuals. Hinata and Kageyama's rivalry evolves as they consider their paths beyond high school, with Hinata seeking to broaden his horizons by training abroad and Kageyama aiming to refine his skills domestically. The film also delves into the aspirations of other teammates, such as Yu Nishinoya, Asahi Azumane, and Daichi Sawamura, as they navigate their final year and prepare for life after graduation. The narrative emphasizes themes of perseverance, teamwork, and the enduring bonds formed through shared experiences.

Throughout the series, the supporting cast plays a crucial role in shaping the story. Characters like Kei Tsukishima, whose analytical approach to volleyball complements Hinata's instinctive playstyle, and Ryunosuke Tanaka, whose fiery determination inspires his teammates, contribute to the team's success. Opponents such as Inarizaki's Miya twins and Nekoma High's Kenma Kozume add depth to the competition, showcasing the diverse playing styles and personalities within the volleyball community.

The films maintain a strong focus on the sport itself, with detailed depictions of matches that highlight the technical and emotional aspects of volleyball. The narrative balances intense gameplay with moments of introspection, allowing viewers to connect with the characters' struggles and triumphs. By the conclusion, the story leaves a lasting impression of the characters' growth and the enduring spirit of competition that defines their journey.