Mara is a beautiful young woman with a string of one-night stands, but they don't fill the void inside her. Except that one day, a former lover of hers is determined to exact his revenge.

Zoe Estola is preparing for an interview to mark the release of her new book. In it, she recounts the botched investigation into the unsolved murder of her younger sister, Eva, conducted years earlier by Inspector Zacchari Memora. As she retraces the case, Zoe seeks to understand why the inspector never submitted the findings of his investigation. This silence seems to be linked to strange memories and repressed promises...