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.

Based on Robert Saviano's bestselling book, this gritty Italian crime drama paints a portrait of the brutal Neapolitan crime organisation the Camorra, as seen through the eyes of Ciro Di Marzo, the obedient and self- confident right-hand man of the clan's godfather, Pietro Savastano.