Catherine Foundling has a plan.

She'll join the Legions of Terror that occupy her homeland and work her way up the ladder until she can effect the kind of changes the former Kingdom of Callow so badly needs. Yet after a night gone from bad to worse she is offered a once-in-a-lifetime opportunity by the right hand of the Empress, the infamous Black Knight: to become his apprentice and learn the business of villainy from one of the most dangerous men in Creation. It’s probably a trap, but when has that ever stopped her? For the sake of the land of her birth, she is more than willing to get her hands dirty. They say the first step on the path to the Tower is the hardest.

Considering the amount of people already trying to kill her, ‘they’ might have a point.

With the rising tide of steam power and machinery, who can come close to being a Beyonder? Shrouded in the fog of history and darkness, who or what is the lurking evil that murmurs into our ears?

Waking up to be faced with a string of mysteries, Zhou Mingrui finds himself reincarnated as Klein Moretti in an alternate Victorian era world where he sees a world filled with machinery, cannons, dreadnoughts, airships, difference machines, as well as Potions, Divination, Hexes, Tarot Cards, Sealed Artifacts…

The Light continues to shine but mystery has never gone far. Follow Klein as he finds himself entangled with the Churches of the world—both orthodox and unorthodox—while he slowly develops newfound powers thanks to the Beyonder potions.

Like the corresponding tarot card, The Fool, which is numbered 0—a number of unlimited potential—this is the legend of "The Fool."