Marina accidentally finds a silver pendant in a shopping bag and wears it proudly when she leaves with her parents for a trip to Istanbul. But something is happening with this small piece of jewelry. Otherwise, why would it attract the intense interest of the tour guide and some of her fellow travelers? This is very strange. However, when Marina falls victim to theft, she realizes that the case is more complicated than she imagined... An acquaintance with Istanbul, where elements of suspense and adventure take the leading roles. [Excerpt from the text on the back cover of the edition]