Eva Hermann, a newly married woman, and Emil, a fastidious and orderly older man, begin their life together under one roof. The wedding night is quietly awkward: Emil struggles to unlock the front door, trying key after key, and a minor mishap with Eva’s pearls leaves him unable to share the bed. He withdraws behind his newspaper, and Eva finds herself alone and disappointed as days stretch into a distant silence. She refuses to endure a loveless marriage and eventually leaves, returning to the estate of her father, a prosperous horse breeder, where she seeks and is granted a divorce.
One day, Eva goes horseback riding on the land around the estate and takes a nude swim, leaving her clothes tossed on her horse. The horse wanders toward a nearby corral, and Eva, still naked, chases after it. Adam, a young engineer working on local road construction, happens to glimpse her moment of vulnerability and defiance. He helps recover her clothes, and though Eva hides in the bushes at first, she cannot help but feel a spark of attraction. After the encounter ends with her getting dressed, she and Adam share a charged moment that lingers in her thoughts. That night, Eva cannot shake the ache of this new sensation. She eventually travels to Adam’s isolated residence nearby, and after some hesitation, they allow their emotions to take over, spending the night together. In the climactic moment of their passion, Eva’s pearl necklace breaks and falls to the floor, a small yet poignant symbol of the fragility of their new affair. The next morning, she forgets to take the necklace, but the couple hope to meet again in town at the local hotel the following evening.
When Eva returns home the next day, she is faced with an unwelcome, persistent visitor: her ex-husband Emil, who has waited all night to see if reconciliation is possible. Eva makes it clear that a reconciliation is no longer an option, and Emil leaves in heartbreak.
Later, while Emil is driving away, he unexpectedly encounters Adam on the road. Adam asks for a ride into town, and Emil agrees. They stop at Adam’s residence to pack Adam’s suitcase, and it is there that Emil notices Eva’s pearls on the floor. He seizes the moment to understand that Adam has been paying attention to the necklace that once belonged to his ex-wife, and jealousy floods Emil’s mind. He contemplates driving into an oncoming train at a crossing, but he restrains himself at the last moment.
That night, Emil sits alone in a hotel room, while a fly relentlessly bats at a closed window, and several other flies are shown trapped in flypaper—moments that underscore a sense of confinement and tension. Downstairs, Adam arranges flowers and waits in the hotel restaurant for Eva, who arrives with a sense of happiness and relief at being reunited with her lover. The two share drinks and dancing, seemingly content, until a gunshot shatters the moment: Emil has shot himself. The news ripples through the hotel as guests run to Emil’s door. Adam, still unaware of Eva’s deeper history with Emil, is left to process the shock. Eva is deeply saddened by Emil’s suicide but keeps the truth of her relationship with him to herself, not revealing it to Adam or anyone else.
The couple plans to take a train to Berlin later that evening to begin a new life together. At the train station, Adam dozes briefly, and Eva slips away quietly to board another train, choosing to daydream of the future she might have with him rather than taking the path she had planned. Adam returns to his work in construction, still imagining Eva and the family they might have someday, holding her in his thoughts as he continues his days.
