[Multiple female protagonists] [Upgraded stream] The extreme cold apocalypse is coming, and the Jiangcheng University special train is trapped on an abandoned platform. Lin Jin, a student majoring in rail transit, awakens to the sole authority of the train commander, formulates rules, upgrades the carriages, gathers functional teams, and turns the dilapidated train into a mobile base. It wasn't until the seventh carriage opened that he discovered that the disaster train was not a rescue tool, but an experiment to screen a new order. While others seek to survive, he has to rewrite the rules.