Set in present-day Japan, Swing Girls is the story of girls who meet and are deeply fascinated by jazz. The heroine is a very typical Japanese teenager. Her character is suggestive of the hidden problem of today children. She lacks any special interests or motivation and dislikes making any effort. But when she discovers jazz, she discovers something she can be absorbed in and begins to transform herself. At first, she is not able to even make a noise. But she and her friends practice and come to be able to play their instruments. They slowly come to be fond of jazz and take part in a music competition.