In Stranger of Sword City, you find yourself inside of a commercial airplane, when suddenly you are alone and crash onto the surface of an unknown land. Dangerous beasts threaten to attack you, and some others come to your aid. They explain that you are one of many Strangers, who came from Earth to this new land in a different dimension, where monsters and special creatures called Lineages threaten everyone's safety. Once defeated, they leave behind a Blood Crystal, which you must then hand over to one of the three vessels of the Gods of Light, Darkness, or Neutrality. Doing so unlocks new Divinity skills, and helps steer the future of the world.