A model named Valentine accidentally runs over a dog and discovers that its owner, a retired judge named Joseph Kern, is keen on invading people's privacy by listening to their private telephone conversations. As Valentine becomes fascinated by Kern's actions, she starts to question the morality of his behavior and the reasons why people obey laws. Through their unlikely friendship, Valentine and Kern explore themes of love, destiny, isolation, and the intertwined lives of people. Their lives intersect with other characters from the trilogy, leading to a tragic ending.

Julie, the wife of the famous composer Patrice de Courcy, must cope with the sudden death of her husband and daughter in an automobile accident. After surviving a suicide attempt, Julie closes up her old house and takes an apartment in Paris, distancing herself from her past. However, life in Paris forces Julie to confront her past and her relationship with Olivier, her husband's friend and lover. As she tries to stop Olivier from completing her husband's unfinished work, Julie begins a relationship with him and resurrects the composition, ultimately accepting the truth about her own work.

After being abandoned by his wife, a Polish hairdresser seeks revenge and plots to get rich by faking his own death.