After teenage ambulance driver Ernest Hemingway takes shrapnel in the leg during World War I, he falls in love with Agnes von Kurowsky, a beautiful older nurse at the hospital where he's sent to recover. Their affair slowly blossoms, until Hemingway boldly asks Agnes to be his wife and journey to America with him.

A saga of class relations and changing times in an Edwardian England on the brink of modernity, the film centers on liberal Margaret Schlegel, who, along with her sister Helen, becomes involved with two couples: wealthy, conservative industrialist Henry Wilcox and his wife Ruth, and the downwardly mobile working-class Leonard Bast and his mistress Jackie.