The room was designed for fun, for the adrenaline of a counted clock. It was a puzzle box in Koszalin, Poland. The details of the theme are unimportant. What matters is the mechanism: a gasoline-powered generator, installed inside to power the game’s effects. The players were five girls, aged 15 and 16. They paid for an experience. They entered. The door, part of the game’s immersion, was likely locked from the outside.
The generator, in the enclosed, poorly ventilated space, exhaled its odorless, colorless product. Carbon monoxide molecules displaced oxygen. They bonded to hemoglobin in the girls’ blood with an affinity 240 times greater than oxygen. The poisoning induces headache, dizziness, confusion. Then unconsciousness. The puzzles in the room remained unsolved. The real trap had no code, no hidden key. It was the air itself. When firefighters finally entered, they found the generator still running, and the five teenagers dead. The tragedy was not in a fire or a structural collapse, but in a simple, lethal error of physics and safety—putting an internal combustion engine in a sealed space where people would be deliberately confined. The game’s ultimate, horrific escape was one they could not make.