Demons and Dragons: Saving the Bridge Between Two Worlds

From the introduction: Demons and Dragons is a fantastical adventure designed to be played by characters of all levels. In this story, the adventurers will face specters, various dragons and will end in an epic encounter against a Fiend Dragon named Kennos, The Dark One. Kennos plans to take over the magic that summons demons to the material plane and with that gather an army of demons.