The town of Wilczogóra always seemed peaceful, yet it hid many secrets. On a warm, sultry evening Marta, Kuba and Michal were walking along a forest path near the river. "Have you ever heard of the old bridge? Where it's supposedly haunted?" - puzzled Michal, poking at the dense foliage with a torch. Martha looked at him with a smile, although uncertainty flashed in her eyes. Cuba just shrugged his shoulders, but his voice was quiet as he answered: "My grandmother said it was better not to go there in the dark." Nonetheless, with each step they walked closer and closer to the stone structure that loomed in the semi-darkness. The bridge was old, partly moss-covered and barely visible from behind the trees, but it had something attractive about it. Below it, the river murmured, casting shadows on the tall pillars. Martha suddenly stopped. "Look!" - she whispered, pointing to something glowing among the stones. They ran closer, trying not to make any noise. There was a small metal object lying by the water itself - it looked like a key, but it was covered with strange markings. The boys exchanged conspiratorial glances and Marta carefully picked up the find. "There's something written here... I think it's Latin. Maybe it's some kind of code?" As they held the key in their trembling hands, they heard the snap of branches on the other side of the bridge. A dark silhouette emerged from behind the bushes, and silence hung in the air. Was someone following them? At that moment, the key in Martha's hands warmed up and made a quiet, almost inaudible whisper-like sound. The friends looked at each other, uncertain if what they were seeing and hearing was really happening. The shadow came closer and closer, and the river began to hum louder than usual. After a while, the mysterious figure stopped right in front of them - its face remained in shadow, and a medallion with the same mark as on the key shone around its neck. They felt as if time had stopped for a moment. And then one quiet question was asked, "Where did you get this key?"