A man finds himself pursued by police and thugs because of a woman he has fallen in love with.

The film starts in the 13th arrondissement of Paris in 1984. Robert Pinot is a police officer as ordinary as clumsy. One day, he stops a certain Josyane, a young drug addict who is also doubled as a pickpocket, nicknamed Marylou. Having discovered that she comes from the same village, Nanteuil, then him, he takes compassion for the young girl and decides to take her under his wing to keep her away from Tony, a dangerous dealer with whom she is in love.

Oscar François de Jarjayes was born female, but her father insisted she be raised as a boy as he had no sons. She becomes the captain of the guards at Versailles under King Louis XVI and Marie Antonette. Her privileged, noble life comes under fire as she discovers the hard life of the poor people of France. She is caught up in the French Revolution, and must choose between her loyalty and love.

In this story of friendship and reproductive rights, 14 years in the relationship between two very dissimilar women are chronicled. Pauline is a middle-class city girl, at odds with her very conventional family. Suzanne is several years older, a country girl with two illegitimate children and another (whom she cannot support) on the way. Pauline loans Suzanne money for an abortion. At this point, the two separate and communicate mainly through postcards. Some years later, they meet at an abortion rally, and they have many adventures and stories to share with one another.