Bahia Benmahmoud, a free-spirited young woman, has a particular way of seeing political engagement, as she doesn't hesitate to sleep with those who don't agree with her to convert them to her cause - which is a lot of people, as all right-leaning people are concerned. Generally, it works pretty well. Until the day she meets Arthur Martin, a discreet forty-something who doesn't like taking risks. She imagines that with a name like that, he's got to be slightly fascist. But names are deceitful and appearances deceiving.

French adaptations of the stories by Agatha Christie.

Charlotte, an alienated sound engineer, travels to the country home where her mother was just murdered. She is quickly frustrated by the lack of progress in the police investigation and so begins her own. While listening to a fresh sound recording she made in her mother's house, Charlotte discovers a strange phenomenon, she can hear sounds from the past in her headphones. Soon she is using this ability to hear the past to piece together the last few days of her mother's life, drawing ever closer to discovering who killed her, even as the murderer returns to try and eliminate Charlotte before they are discovered.

Stumbling across an uncompleted 1939 film called "Princess Marushka", filmmaker Sam becomes intrigued with the young actor Sylvain Marceau, who last appeared in the film. Hoping to discover the mystery behind Sylvain's disappearance, Sam decides to make a documentary and sets off to interview those who knew Sylvain, including elderly Lisa Morain. Through her interview, Sam learns the story of Lisa and Sylvain's doomed love affair on the eve of World War II.