After their success in the qualifying round for the Kansai regional competition, the members of the Kitauji High School concert band focus on their next upcoming performance. They make the most of their summer break by attending a camp, where they receive instruction from their band advisor Noboru Taki and his friends, who work as professional musicians. Kumiko Oumae and her friends remain determined to win gold at the Kansai competition, but trouble arises when a former member who once quit the band expresses interest in rejoining, sparking unpleasant memories for the second-year students. Kumiko also discovers her teacher's surprising past and the motivation behind his desire to lead the band to victory. Reaching nationals will require hard work, and the steadfast conviction in each student's commitment to the band will be put to the test.