In early summer in Edo, Sanshirō, known for his beautiful singing, is a devoted son living in a tenement with his blind mother Okura. He works as a delivery boy for the caterer "Yaoyorozu." His brother, Chōjirō, who disliked being a plasterer, ran away from home and became a subordinate of the yakuza Yamashita no Gonsuke. On a delivery, Sanshirō catches a vagrant child, Erippē, stealing a flower hairpin from Ochiyo, the daughter of the wealthy merchant Narumiyaya Bunzaimon. Impressed by Sanshirō's character, Bunzaimon considers him as a potential son-in-law for Ochiyo, who admires Sanshirō.