Lifelong family secrets are revealed through a series of letters which arrive along with condolence notes in this novel written by French novelist Helene Gremillon. Camille, a single woman in her thirties has just lost her mother and has recently found herself to be pregnant. She begins receiving long, unsigned letters telling a story that she knows nothing about. As they continue to arrive she learns of a previous war time love triangle. Wealthy Monsieur and Madame M cannot conceive a child. Madame M is deperate to have a baby, and the wartime efforts are pushing all women to have children. She befriends a teenage girl of lower class and helps provide the necessary art supplies that Annie needs to encourage her creativity. Annie becomes so close to Madame M that she empathizes with her to the point of offering to have her child.
This dark tale of love gone wrong jumps between the present and the past with many twists and involved secrets. Camille begins to guess that these letters may involve her much more deeply than she wants to know in The Confidant.