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Climate change has made the planet uninhabitable. Those few who survived the planet's demise live aboard a train that perpetually circles the same track. The tail section is like a slum, filled with people who are cold and hungry, forced to live by their wits, while the front section contains the chosen few, who indulge in alcohol and drugs in luxurious surroundings. The world inside the train is far from equal. In the 17th year of the train's infinite course, a young leader from the tail section stirs up a riot that has been brewing for some time. In order to liberate the tail section and eventually the whole train, this hero and his fellow passengers charge toward the engine located at the front of the train, where its creator, the absolute authority, resides in splendor. But unexpected circumstances lie in wait for humanity's tenacious survivors.