Once upon a time, in a rainy autumn in Paris, one sad man, waiting for his beloved woman, wrote her a letter. It remained unread on the table because that woman did not come. A quarter of a century later, a love letter, in a completely incredible way, ended up in the hands of Vera Belova, the director of a small Moscow travel agency, in the past an incorrigible romantic journalist. Struck by the depth of feelings of an unknown Frenchman, Vera goes to Paris, wanting to uncover the secret of a mysterious love story.