Taking place in a modern era but it all takes place in mideival times when the myths were not so...mythical. Humans grew and developed rapidly wiping out these beasts and creatures till they were beginning only exist in song, and that song into text and the text to what campers would whisper about around the campfire to scare their companions.
But..
They were never truly gone yet. Diluted bloodlines and such have been discovered and brought back by these humans in the 1950-60s. When they let crack be put into just about anything. It was all a decent distraction and such thanks to druid hippies and gypsy phsycics traveling about and practicing their magic. Who was to tell the real from the fake? Heck even some joined the circus to hide in plain sight of the humans and their growing experiments on their kind.
Then it all exploded. Attempting to recruit them for the war didn't turn out very well, so they tried to develop their own recruits but even then, all of the humans hard work and effort just blew up in their face and ran straight out of the door. How has been sealed away and the whole operation has been shut down. A new problem beginning to surface out over the years.
The myths, also known as Critters, have now mingled in with society and were quickly learning their way around in the real world. Laws for both sides have been passed and hunting groups for those that act out have been created to.. put to rest the Critters that break the rules sending them back to the bunkers where they have been turned into personal prison cells.
Someone is still busting them out and many every year are going missing, but by who? And where?