"Kuroko no Basuke Winter Cup Sōshū-hen: Kage to Hikari" serves as a compilation film that condenses the Winter Cup arc of the "Kuroko no Basuke" series, focusing on the intense basketball matches and the evolving dynamics between the characters. The narrative centers on Seirin High School's basketball team as they compete in the Winter Cup, a national high school basketball tournament. The team is led by Taiga Kagami, a powerful and athletic forward, and Tetsuya Kuroko, a former member of the "Generation of Miracles," a group of prodigiously talented players from Teikō Middle School. Kuroko's unique playing style, which emphasizes misdirection and passing, complements Kagami's explosive scoring ability, making them a formidable duo.

The film highlights Seirin's journey through the tournament, showcasing their matches against other high school teams, many of which feature former members of the Generation of Miracles. These players, now scattered across different schools, include Ryōta Kise, Shintarō Midorima, Daiki Aomine, Atsushi Murasakibara, and Seijūrō Akashi. Each of these players possesses extraordinary skills and represents a significant challenge for Seirin. The matches are intense and strategic, with both teams pushing their limits to outplay each other.

As the tournament progresses, the film delves into the personal growth of the characters, particularly Kuroko and Kagami. Kuroko's determination to prove that teamwork can surpass individual talent is a recurring theme, while Kagami's rivalry with the Generation of Miracles drives him to improve his skills. The narrative also explores the relationships between the former Teikō teammates, revealing their shared history and the reasons behind their divergent paths.

The climax of the film centers on Seirin's final match against Rakuzan High, led by Akashi, the former captain of the Generation of Miracles. This match is a culmination of the themes of teamwork, perseverance, and the clash between individual brilliance and collective effort. The resolution of the tournament underscores the importance of trust and collaboration, as Seirin strives to overcome seemingly insurmountable odds.

Throughout the film, the pacing maintains a balance between on-court action and character development, ensuring that the emotional stakes remain high. The interactions between the players, both on and off the court, provide depth to the narrative, making the matches more than just physical contests but also battles of will and ideology. "Kuroko no Basuke Winter Cup Sōshū-hen: Kage to Hikari" effectively captures the essence of the Winter Cup arc, delivering a compelling story of ambition, rivalry, and the pursuit of excellence in basketball.