1810 England, the height of the Napoleonic wars. It was thought that humans walked the path of enlightenment leaving monsters and dark things behind. However, those monsters and night stalkers merely hide in the darkness, as a young maid, Bernadette, soon finds out.
my thoughts on sunlight burnt vampires: Orlok did not burn in the sunlight; he instantly disintegrated in a puff smoke (no fire at all). Vampires in Buffy the Vampire slayer catch on fire.
In old lore (predating the Bram Stoker novel), the accounts vary; sometimes vampires catch on fire and othertimes they are severly weakened by sunlight. One of the was you could tell if a person was a vampire in the old days was if they were very lethargic in the daytime (never mind that it could have just been from lack of sleep).