Kawai Midori's father left the family a long time ago and since her mother passed away, she has taken care of her younger siblings by herself by working with a group of itinerant camellia oil peddlers. While she is In Izu selling camellia oil, she meets a young student, Katō Yutaka, who asks her to let him take her picture. The peddlers also meet a jazz band, and when Midori sings a song, teased by the band's star singer Nanjō Haruo, the band members are enraptured by her beautiful voice. She eventually joins the band and quickly becomes a popular jazz singer.