In the year 745 of the Radiant Era, the gods that once roamed the mortal realm have returned to the celestial expanse. As the gods fall silent, a new era for humanity has begun. Seekers of hidden truths, mystical adepts, have laid the paths of the clouds, and the lion-like griffins that sail the cloud seas have forged a pact with these adepts. The mighty sword of the Sky Island responds to the resolve of the brave, while the labyrinthine dungeons of the Underworld echo with the whispers of malevolent demons. The apostles of the original sin ignite the skies, driven solely to claim the authority of the ancient deities. This is the story of the main characters in the book of swords and magic.