A stranger came to Polly and Leila. His name was Omar. Omar was a local historian. He was very interested in the treasure. He said he had studied it for many years. Omar's arrival changed their quest. "You must understand," Omar said. His voice was calm but serious. "Finding the treasure is not just about money. It is about saving our history. The map is only part of the journey." At first, Polly and Leila were unsure about Omar. But soon they saw that Omar's knowledge was helpful. The way to the treasure was dangerous. They had to go through the narrow streets of the Medina. They also had to explore the city's hidden areas. Time was short, so they started their journey. They moved through busy markets and old paths. Each turn tested their new friendship. Each moment brought them closer to the mystery. As night came, a problem appeared. The map led them to a door. But the door would not open. It seemed like the city was keeping its secrets.