After receiving a phone call from a woman whose child has contracted polio, government official Masayoshi Sakata decides to do everything he can to eradicate the disease.

Keiju Kobayashi
as Masayoshi Sakata

Hideko Takamine
as Noriko Nemoto

Yaeko Mizutani
as Yumi

Kon Omura
as Satoru Kumagai

Shirō Ōtsuji
as Jiro Nemoto

Isao Kimura
as Professor Hiraoka

Kin Sugai
as Setsuko Sakata

Fumiko Okamura
as Mother Nobu

Jun Tazaki
as Director Tagami

Tetsuo Hasegawa
as Abe