In a future where a failed global-warming experiment kills off most life on the planet, a class system evolves aboard the Snowpiercer, a train that travels around the globe via a perpetual-motion engine.
Jing is a teenager who starts dating Eiam, a woman who is 20 years older than him. Things go well at the beginning of their relationship because of their optimistic attitude and strong efforts to adjust to each other's lifestyles.
Life for former United Nations investigator Gerry Lane and his family seems content. Suddenly, the world is plagued by a mysterious infection turning whole human populations into rampaging mindless zombies.