The first half of the film, shot on black and white film, follows a man named Edgar who is working on an undefined "project" about what he considers the four stages of love: meeting, physical passion, separation, and reconciliation, involving people at three different stages of life: youth, adulthood, and old age. Edgar keeps flipping through the pages of an empty book, staring intently as if waiting for words to appear. He is unsure whether the project should be a novel, a play, an opera, or a film. In Paris, he interviews potential participants from all walks of life (including those people Victor Hugo dubbed les misérables, whom Edgar considers important to the project), but is continually dissatisfied. The person Edgar really wants is someone he met two years ago, a woman who "dared speak her mind." At the urging of his financial backer Mr. Rosenthal, an art dealer whose father once owned a gallery with Edgar's grandfather, Edgar tracks down the woman, named Berthe, where she is working at night cleaning passenger cars at a railroad depot. Berthe remembers Edgar (and marvels at his memory) but emphatically does not want to be involved in his project. She holds down several jobs and also cares for her three-year-old son. Edgar continues to interview people, to his continuing dissatisfaction. He is able to visualize the stages of youth and old age but keeps having trouble with adulthood.