Spanish reader for non-native speakers, suitable for children and adolescents (ages 10-14), level A1/A2. This educational story revolves around Juan, Andrés, and Rocío, three young people from Valladolid. They are enjoying their vacation in the village of Andrés and Juan's grandparents. During their stay, they discover an interesting photo in an abandoned cave with five young people and various objects, including a letter to decipher. Who are the people in the photo, and where are they? These riddles pique the young people's curiosity. They hope to find answers back in their town, but will they succeed?