After triumphing in the qualifying round for the Kansai regional contest, the Kitauji High School concert band focuses on their next performance. During the summer break, the band attends a camp led by their advisor Noboru Taki and his musician friends. Determined to achieve gold at the upcoming competition, Kumiko Oumae and her friends face a challenge when a former band member seeks to rejoin, stirring up difficult memories for the second-year students. As Kumiko uncovers her teacher's unexpected past and the reasons driving his ambition for victory, the path to nationals demands dedication and unwavering resolve from each band member.