Series Plot: Set more than seven years after the world has become a frozen wasteland, Snowpiercer centers on the remnants of humanity who inhabit a perpetually moving train, with 1001 cars, that circles the globe. Class warfare, social injustice and the politics of survival play out.
Episode plot: Snowpiercer, the Great Ark Train, has kept the last remnants of humanity alive for almost seven years. A rigid class system maintains order, with First Class holding power over workers, while a condemned Prison Class struggles to survive in the Tail. Now, a grisly murder is stoking class division, so Melanie Cavill, the powerful head of hospitality, deputizes a dangerous rebel to help solve the killing - Andre Layton, the world's only surviving homicide detective.