The series Snowpiercer picks up seven years after the events of the original film. The titular train carries the last remaining members of Earth in a post-apocalyptic world due to a global ice age.
The train has a social class hierarchy, whereby the upper-class passengers live a completely different life from that of the lower-class ones. Upper-class Hospitality Director Melanie Cavill (Jennifer Connelly) spends her time ensuring that everything aboard Snowpiercer is going according to plan, and that the lower-class passengers remain under control. Lower-class freedom fighter Andre Layton (Daveed Diggs) decides to stand up for balance and equality between the two groups.