Dai Miyamoto’s life changes when he discovers jazz. He picks up a tenor saxophone and practices every day. After leaving his hometown Sendai, he pursues a music career in Tokyo with help from his friend Shunji. One day, Dai plays passionately from the heart and convinces talented pianist Yukinori to start a band together. Along with Shunji, a beginner drummer, they form the three-piece band JASS. With each live performance, they get closer and closer to their dream of playing at So Blue, the most famous jazz club in Japan, in hopes of forever changing the world of jazz.