Poor physics student Marie is studying at the Sorbonne in 1890s Paris. One of the few women studying in her field, Marie encounters skepticism concerning her abilities, but is eventually offered a research placement in Pierre Curie's lab. The scientists soon fall in love and embark on a shared quest to extract, from a particular type of rock, a new chemical element they have named radium. However, their research puts them on the brink of professional failure.

A 4F military school teacher's lie about being accepted for active duty causes problems on the home front.

Middle-class housewife Kay Miniver deals with petty problems. She and her husband Clem watch her Oxford-educated son Vin court Carol Beldon, the charming granddaughter of the local nobility as represented by Lady Beldon. Then the war comes and Vin joins the RAF.