At night, when the last reader had left the walls of the Deep Silence Library, Olive sat in a corner, listening to the calming rustle of pages being turned by the wind. For her, the library was a second home - a place where she could forget her everyday life and hide from the noise of the world. Michael, her friend and self-proclaimed adventurer, was impatiently stamping his feet at the entrance. They were silent for a while, both of them focused on a mysterious map that Olive had accidentally found in one of the oldest books. The map showed a plan of the library, but in the margin of the map was an unknown tunnel marked with a vortex-like symbol. - Is this some kind of joke? - Michael asked in a half-hearted voice. - I don't know... - Olive gently touched the paper. Her fingers betrayed a slight tremor. They decided to see what was hidden under the room with the oldest volumes. In the light of the torch, they descended a stone staircase, which, as it turned out, led to a door hidden behind a bookcase. The door had no handle, but when they both touched a brass plate with an engraved swirling symbol, the wood trembled and swung open with a quiet groan. Behind the door stretched a narrow corridor. Drawings of ancient creatures appeared on the walls, and the air trembled with a strange energy. - I can feel it... There's something here,' Olive whispered. At the end of the corridor was a stone gate entwined with ivy. In the centre of the gate pulsed a bright blue vortex - just like the one on the map. Michael brought his hand close to the portal, and then the gate flashed with light. The echo of quiet whispers spread through the tunnel, and the floor trembled slightly. - If we go through there.... will we go back? - Olive looked at her friend. Before they had time to decide, the vortex on the other side of the portal suddenly darkened and a misty figure appeared in it, reaching out towards them, whispering words in an unknown language. Michael took a step forward and Olive held out her hand to him, trying to stop him....