In the wave of steam and machinery, who can touch the extraordinary? In the mist of history and darkness, who is whispering? I wake up from the mysteries, open my eyes to see this world: firearms, cannons, warships, airships, differential machines; magic potions, divination, curses, the Hanged Man, sealed objects... Light still shines, and the mysterious has never been far away. This is the legend of the 'Fool'.