As the last ray of the sun hid behind the forest line and the mist slowly began to envelop the clearing beneath the old castle, a group of friends sat in a circle under a large oak tree. They sat there: Marta, always ready for action, Bartek, a born sceptic who had a retort for everything, Kacper with his ever-present camera and Lena, whose laughter distracted even the densest darkness. The evening air was heavy with the smell of wet grass and the promise of adventure. The dangerous legend of the castle had always circulated among the villagers. It was said that when the night was particularly dark, a mysterious light would appear in the ruins and someone - or something - would emerge from the ancient underworld. For the group of friends, it was a sign that this very day they had to find out how much truth there was in this legend. Each of them was eighteen or older, so the thrill no longer seemed just child's play. Passing through the ivy-covered gates of the castle was like entering another world. All you could hear was the rustling of leaves underfoot and the echoes of your own breathing. Kacper was the first to pull out his torch and camera, ready to document anything interesting. Bartek whispered sceptical remarks under his breath, but even he could not hide his anxiety. Marta squeezed Lena's hand tightly, feeling a mysterious tension hovering in the air. Inside, a cracked staircase leading down to the underground awaited them. Someone, probably Marta, read from a faded badge above the entrance: "Don't go in if your life is to your liking". Nevertheless, they did not hesitate - one by one they descended the slippery steps, staring into the darkness that grew thicker with each step. There was a chilly silence below ground. As the friends wrenched their way through the overgrown corridors and stone walls, a pale light began to glow in front of them. Then Bartek stopped abruptly, whispering: - Do you hear that? A muffled sound came from the distance - something like whispers and heavy footsteps. After a moment, a silhouette emerged from the shadows. It looked human, but its eyes reflected only the glow of a torch, and the damp air began to vibrate from someone's presence. The friends froze with their hearts pounding, wondering if they had just become the heroes of their own legend, or if someone (or something) had been waiting for them here for ages....