The great observation dome of the Zenith 7 orbital station was bustling with life. Conversations in various languages rang out from all sides, and the panoramic windows offered a view of the distant outskirts of the Orion Nebula. For Mai, Alexie, Zoska and Nils, this day was the culmination of months of preparation - the Interplanetary Exploration Competition was about to begin, in which teams of teenagers from different corners of the Solar System were to take part. Each of the four had something that set them apart from the other teams: Alexi was excellent at piloting ships, Zosia was an expert in coding and navigation, Maja was fascinated by exobiology and Nils knew every type of space equipment. Together, they made up the 'Orion X' team. At the briefing, the referee explained the rules - each team's task was to find and bring back a sample of an unusual mineral from one of the remote asteroids on the outskirts of the Orion Nebula. Each expedition was to last no longer than 48 hours. As soon as they boarded their light research vessel, the tension and excitement was palpable. During the flight, the team worked smoothly, exchanging short, matter-of-fact commands. Everything was going according to plan - until a disturbance appeared on the navigation screen. Zosia noticed a strange signal. "Something's not right here," she muttered, tracking the unusual energy pulses coming from the nearby moon. "It's not one of the locations marked in the instructions," she added, turning up the sensitivity of the sensors. Alexi glanced at the ship's clock. They still had plenty of time, but curiosity won out. They changed course. As they approached the mysterious signal, the ship suddenly trembled and communications with the base broke down. A swirling violet-coloured fog stretched around them, which was not on any map. "Where are we?" - Maja asked, leaning out of a side window. At the same instant, the onboard systems registered a formation on the surface of a nearby, unmarked planet - geometric shapes, as if built by an alien civilisation. Silence reigned. The team looked at each other, and the hatch door slowly opened, letting a mysterious, pulsating glow into the cabin....