A wave of excitement swept over the city as colourful posters adorned in gold lettering appeared in the marketplace: "Night Circus of Illusions - One Evening, One Secret". Rumours spread rapidly. It was said that the circus only appears once a decade and always leaves a trail that no one can understand. Anka, Piotr, Lena and Kuba - a group of old friends from their university days - decided to get out of their daily routine. They agreed that on this night, armed with scepticism and a thirst for adventure, they would go to the strangest show of their lives. The big circus tent looked as if it was floating above the ground. The smell of candyfloss and burning incense wafted through the air. Somewhere in the distance, someone was playing a violin and the shadows of the jugglers danced around the tent. From the loudspeakers came the hushed voice of an announcer: "We are beginning a journey that cannot be undone". The tickets felt like chunks of ice in their hands. Each friend felt a stab of anxiety as they crossed the threshold of the tent. Inside, the lights were muffled and the audience sat quiet and upright, as if in a trance. After a moment, the spotlights flashed and the Director appeared in the middle of the arena - a tall man wearing a mask that was indecipherable whether it represented a living or dead face. The shows started innocently enough: a tightrope walker hovered over people's heads, an acrobat levitated in the air without any ropes, a clown cried glass tears that immediately turned into butterflies. With each successive number, the performances went from juggling to something that defied logic, playing on the border between dream and java. As the lights in the arena began to flicker and the chairs around the friends slowly disappeared under a blanket of mist, the Director looked straight at them and smiled mysteriously. "Time for the most dangerous illusion of the night," he said in a whisper that I don't think anyone but them heard. The curtain fell, the world swirled and - suddenly - Anka felt the floor remove itself from under her feet. All four of them were no longer in the circus, but in a place that looked like a reflection of their memories. The door behind them slammed shut with a deafening bang. The tension was rising. For the first time they were really starting to feel scared. Where did they find themselves? Was it still an illusion or already something much more?....