Berry struggled to climb the last stone lying at the foot of Oak Hill. The sun was slowly setting, gilding the crowns of the old oak trees. Beside her walked Franek, her younger brother, who had been whining that his legs hurt since the morning, but now his eyes sparkled with excitement. They had never been this far from the village before. Apparently, ancient powers still sleep in this forest. Grandmother often told stories of strange apparitions, talking animals and dwarves that can only be seen on moonlit nights. But tonight there was no moon. Instead, it was a hot summer day, and Berry was holding something far more unusual than her own fears - an aged yellow map they had found in the attic at her grandmother's house. They had deciphered the ancient drawings and symbols that showed the way through the forest to a place marked by a black circle. It was there that they were to arrive before sunset. "Just a bit further!" - whispered Jagoda, looking nervously at the shadows lengthening between the trees. Franek followed her, clumsily stepping over twigs. The air grew thicker and thicker with the smell of mosses and forest herbs. At one point they heard a strange, quiet laughter that seemed to come from all directions at once. Suddenly, a huge fern bush bloomed right next to them and something moved inside. Franek stopped as if he had been caught off guard, and Berry felt a chill on the back of her neck. A small figure emerged from the thicket - it was neither a fairy nor a forest animal, but something in between. She had emerald eyes and hair tangled with leaves. Nearby, in the bushes, a piece of metal flashed by - it was a medallion, the same as on the map. The figure pointed a finger down the path at the children, and the forest around it rippled like the sea. Berry and Franek approached the medallion, not knowing whether they should turn back or dare to go even further....