The story Peter is telling the about a special summer, when he is invited over to summer holiday from bickering parents, to his aunt and uncle in the country.
Letter carrier Eva is in her late twenties, unmarried and the mother of a twelve-year-old son. She falls in love with Jon, a bargeman who is unfortunately already engaged.
An extended dream sequence presents a biblical allegory about the creation, downfall and rebirth of humanity, told through a series of surrealistic vignettes and musical numbers.