The murder of 13-year-old Yara Gambirasio shocks the little town of Brembate di Sopra, Italy. To bring the culprit to justice, prosecutors have only scant DNA evidence and no database to compare them to. Based on a true story.
When the most important friend in her life seems to have disappeared without a trace, Elena Greco, a now-elderly woman immersed in a house full of books, turns on her computer and starts writing the story of their friendship.