In legendary Chen Village, everyone is a martial arts master, and uses a powerful form of Tai Chi in all aspects of their life. Yang has arrived to try and learn it, only to find that it's forbidden for the villagers to teach their secret style to an outsider. But when a mysterious man comes to town with a frightening steam-powered machine and plans to build a railroad through a village, the villagers realize they may have no choice but to put their faith in Yang, who has a secret power of his own.