With just three days left before an impending disaster, a family frantically prepares their old home for survival by stockpiling 50 tons of coal and sealing the house like a ruin. The biggest challenge is securing diesel for their generator, but after contractors fail, the father contacts a reckless old friend who delivers diesel covertly at night. When a neighbor grows suspicious, the family fabricates a story to keep their operation secret. Exhausted but confident, they believe their stockpile can sustain them for three years, only to be abruptly warned of a sudden global temperature drop, raising the stakes as time runs out.