Jeanne, engaged to a young plumber, falls in love with a nobleman, Viscount of Prèves, and goes to live with him. For two years, she lives happily with him and has a son by him. But one day she recognizes her former fiancé in the person of a worker who has come to fix a gas leak. The viscount, who surprises them, believes they are guilty. He kicks the workman out of his home and overwhelms his wife with suspicion. So much so that Jeanne runs away from him with her son. Courageous and hard-working, she manages to bring him up till the day she gets killed by a car. Her son, who has now become an idle and lazy young adult, decides to be revenged on his father…