Against a background of war breaking out in Europe and the Mexican fiesta Day of Death, we are taken through one day in the life of Geoffrey Firmin, a British consul living in alcoholic disrepair and obscurity in a small southern Mexican town in 1939. The consul's self-destructive behaviour, perhaps a metaphor for a menaced civilization, is a source of perplexity and sadness to his nomadic, idealistic half-brother, Hugh, and his ex-wife, Yvonne, who has returned with hopes of healing Geoffrey and their broken marriage.
While filing for a divorce, beautiful ex-stripper Roslyn Taber ends up meeting aging cowboy-turned-gambler Gay Langland and former World War II aviator Guido Racanelli. The two men instantly become infatuated with Roslyn and, on a whim, the three decide to move into Guido's half-finished desert home together. When grizzled ex-rodeo rider Perce Howland arrives, the unlikely foursome strike up a business capturing wild horses.