"Twins with a profound capacity for communicating without words. A fragmented letter in three pages that leads them on a family adventure, to the depths of a mystery of pain and the need for survival. A journey that makes them experience and awaken some of the great secrets of family relationships. The most unforgettable summer of their lives. When Julia and Diego's mother reveals the existence of a letter from their great-grandfather that contains a message written to his family shortly before being executed during the Spanish Civil War, the siblings decide to go searching for it ... and find it. Reading the letter leads them to undertake a journey to imitate their great-grandfather's path during his final days, his arrest in Paris and subsequent delivery into the hands of the Spanish army. On retracing his steps, they find shocking clues about his life and the remaining pieces to complete the family puzzle"--