Erica Faure, 41, is a successful writer of detective novels. Returning to her hometown to empty the house of her deceased parents, she discovers the lifeless body of Alexandra, her childhood best friend, with her veins cut. Convinced that it is not a suicide, Erica launches into an investigation where past and present intertwine. However, it is above all his meeting with Captain Patrick Saab that will turn his life upside down.
Following a violent explosion involving two boats in the south of France, a mother attempts to figure out what happened to her son and how the body of her long estranged sister ended up on the beach.