There is a mountain that rises above the city of Lecco, whose spiers and jagged peaks are known all over the world: it is the Grigna! But very few know that this mountain hides within itself a unique legend that was told in a song written in 1954 and which tells the story of a knight in love, a heartless warrior and an unfortunate sentry. It will be thanks to the discovery of a mysterious parchment that Nino and Camilla, the protagonists of the book, will discover the testimony of a distant past that has left its traces in the world around us.