Before the onset of the extreme-cold apocalypse, Chen Yan discovered something unusual in the numerical simulation lab at the meteorological center. The polar vortex's projected path had shifted in a way unseen in a century, and for a full week, the global atmospheric circulation model had displayed red warning screens. The simulations pointed to a prolonged global freeze, with temperatures potentially dropping below minus 120 degrees Celsius. He reported it to his superiors, but they blamed a model error and dismissed his findings. His peers in the field were also skeptical, with only a few old friends willing to discuss the data privately. Chen Yan spent the night checking his calculations again and again. Once he confirmed the model was correct, he realized this crisis would be a fight for the survival of human civilization.
