The film tells the story of a young widow, Anne (Anouk Aimée), a film script supervisor whose late husband (Pierre Barouh) was a stuntman and died in an on-set accident, and a widower, Jean-Louis (Jean-Louis Trintignant), a race car driver whose wife committed suicide after Jean-Louis was in a near fatal crash during the 24 hours of Le Mans. They meet at their respective children's school inDeauville. They share a ride home to Paris one night after Anne misses the last train, and their mutual attraction is immediate. The story follows their budding relationship over the course of several trips back to Deauville, and as they fall in love despite Anne's feelings of guilt and loss over her deceased husband. After a night together in Deauville, Anne finds herself unable to be unfaithful to the memory of her husband, and decides to leave Jean-Louis. While she is traveling back to Paris by train, Jean-Louis races to meet her at the station, and when she gets off the train she is surprised to see him there. Happy that her lover had come back for her, they embrace as the film ends, the final outcome of the relationship left open to interpretation.