There is a world of magic, myth, and monsters that exists beneath the surface of our own. In Lost Fantasy, a magical world lies beneath ours, and first contact was made over a hundred years ago between the two worlds due to a natural disaster, resulting in a schism that allowed monsters to break through. Since then, secret monster slayers, known as The Great Hunters, have been working with global leaders to police the border and to keep our world safe from the creatures that lurk in the shadows. But last night, something broke through, resulting in a mysterious mass killing in Montana, and causing things to shift in a way that will ripple through both worlds. Now it's up to rookie monster hunter Henry Blackheart to stop it.