The film is set five years after Taiwan lifted martial law in 1992. It’s about a boy’s dream and difficulties he faceds. Jiang is a teen boy studieds in elite high school and be is expected to enter Top 1 medical college. In order to pursue his music dream, Jiang joins a marching band in school without informing parents. However, the marching band mainly serves for outdate martial music has been disputed to close. Jiang and his mates fight to save the band and participate a contest to return the honor.

改編自臺北市立建國高級中學樂旗聯隊 真實故事，亞洲首部以「行進管樂」為主題的華語電影──《進行曲》，講述一群參與學校管樂隊的高中生，面臨社團存廢危機，決定追尋心中渴望，逐步成長並將社團轉型為美式樂旗隊的故事。