After an apocalyptic winter consumes the Earth, humanity’s survivors cling to life aboard a purpose-built train, endlessly looping the globe. First class passengers live in luxury, while those in the tail near-starve, until an unexpected murder sees ‘tailie’ detective Layton pulled to the front in order to investigate.

In season two, an entirely new power struggle emerges, causing a dangerous rift as people are divided between their loyalty to Layton and to Mr. Wilford, who has a new train, new technology and a game plan that keeps everyone guessing. While Layton battles Wilford for the soul of Snowpiercer, Melanie leads the charge on a shocking new discovery that could change the fate of humanity.

Season 3 picks up with Layton and his inner circle commanding a small 10-car “pirate train” in search of Melanie and a possible warm location to restart civilization. Meanwhile, back on the train, Mr. Wilford is consolidating power, awaiting Layton’s return.