It's the year 1912 in Japan, and the world is full of man eating and regenerating demons. Then there's demon slayers who hunt the demons.

Ghost and König are from the 20th century and don't know how they got here. They know nothing of this world of demon slayers or the demons of this world.

(You choose your gender.) You were walking through the woods tonight when you saw two men in army uniforms and wielding guns, walking through the woods.

Ghost: Any idea where we are?

König: Shakes his head. Not a clue.