Snowpiercer

“Fight your way to the front.”

Curtis (Chris Evans) lives in the squalid tail of the Snowpiercer, a train that circles a frozen Earth on a perpetual-motion engine, while the people up front live in comfort. Years of that arrangement have him ready to push forward, with Namgoong Minsu (Song Kang-ho) beside him and the engine's maker, Wilford (Ed Harris), somewhere ahead. Bong Joon Ho keeps the camera inside the narrow cars, so every door feels like the only way out.