Reign of Atlantis: A Prequel

In an alternate reality where Atlantis never sank, the people of the underground are under the thumb of Atlantean rule, left with the steam-powered crystal tech of a bygone era. Sparks, a young elite female, is fighting this reign with everything in her. Now that her older cousin, Gage, has joined the elite Atlantean guard called the Nasaru, can Sparks keep her secret from him, the person closest to her? Will the underground forever be stuck in the steam-powered past?