The Firebats revolt against their oppressors and one heroine starts to explore the Underworld. After finding the Sphera Artificium, she embarks on a journey to defeat Morningstar and his Lieutenants and finding a way out, while finding clues about the Firebats' forgotten past.

The Firebats revolt against their oppressors and one heroine starts to explore the Underworld. After finding the Sphera Artificium, she embarks on a journey to defeat Morningstar and his Lieutenants and finding a way out, while finding clues about the Firebats' forgotten past.