From the core book introduction:
Middlemist, a Realm stepped in archaic history, rests upon a great bell of hollow rock floating beneath the Celestial Heavens and above the shadowed void of the Abysmal Planar. The elves of Clanmarch call their world Shelmarch, (Beautiful World of the Garden) while the dwarfs know it as Alentek (Forge Cradle of the Mountain). The humans call it Middlemist, from the elven Middel Miist, referring to the Heart Stone Eurskellindor (The First Great Gift), heart of the giant dragon Neotip who surrendered immortality for the sake of his kin and saved the world from the dark forces of the empire.
The Middlemist fantasy campaign setting is system agnostic and can be used with any fantasy rules. The setting initially was developed to support play-by-mail/play-by-email campaigns. Geographically, the campaign is set in an alternate-history Indian sub-continent.