the earth fall into frozen, due to man made mistake. only few thousand survivors in one external working train. which designed by one person named Wilson. The people at tail was suffering too much. people decided to rebel with the encourage from one old leader. and the hero was the key man to find the way fight with the security guard. after hard war ,he pass through all the harshness and reach the front meeting with wilson. who explained the rebel was planned and courage by him and the old man who was the leader in tail cabinet. he was angry but almost convinced by Wilson about the ecosystem,which need only 74% people remain in the train to be substainable . at the last moment ,the girl who can see through the wall .opened the floor of the train, seeing there is one small boy was kept there operate the train undercovered manually due to the shortcoming of the train design. he was awakened .and saved the boy life by cutting his one hand even. in the end, the wall of the train was explored .the wall was the protection inside the train ,also the hurdle to go out of the train to find a new world.
this movie makes you try to understand how the world operate ,poor people, rich people ,everyone was supposed to have preorder position .but the hope to change make the world toward to balance