In 1457, during the Ming dynasty, cruel and cunning eunuchs seize power. One of them, Zhao, secures the execution of General Yu and orders the destruction of all his heirs, but they are exiled to a remote border post called the Dragon Gate. Zhao is not going to stop halfway and sends a squad of assassins to the tavern through which the escort will inevitably pass. But wandering warriors wander in there and stand up to defend the innocent.