After triumphing in the Kansai regional qualifiers, the Kitauji High School concert band gears up for their next challenge. Immersing themselves in a summer camp led by their advisor Noboru Taki and his musician friends, Kumiko Oumae and her peers aim for gold at the upcoming competition. However, tensions arise when a former band member seeks to return, stirring up painful memories. As Kumiko delves into her teacher's enigmatic past and his drive for victory, the band's journey to nationals demands unwavering dedication and resilience from each member.