An experiment gone awry prompts a new ice age which deems the planet inhabitable. The remaining survivors are aboard the Snowpiercer, a train circling the globe and powered by a perpetual-motion mechanism. The train is owned by a wealthy entrepreneur named Wilford (Ed Harris) who was ridiculed for coming up with a modern day Noah’s Ark back in the day, not knowing that his creation would end up to be the salvation of the human race. Since the train is private property, a hierarchy among its passengers exists, with the poor residents occupying the tail end of the train while the chosen few in the elite circle enjoy a life of splendor at the front. From time to time, Mason (Tilda Swinton), Wilford’s right hand, visits the occupants of the tail to make sure that their subjugation is in place. Years of deprivation and unequal treatment have taken its toll, though, and a rebellion is about to begin. Led by Curtis (Chris Evans) and his wingman Edgar (Jamie Bell), will the proletariat be able to succeed in taking over the train?