In a world where Napoleon V rules France, scholars have vanished for 70 years, stalling technological progress. Without modern innovations, society is stuck in the 19th century, reliant on coal and steam. A teenage girl named Avril, her talking cat Darwin, her grandfather Pops, and a young informer Julius embark on a perilous journey to find Avril's missing scientist parents, navigating treacherous dangers and unraveling mysteries in this bizarre Rigged World.

April and the Extraordinary World
In 19th-century France, where steam power reigns and Napoleon V holds sway, a young girl named Avril sets out to uncover the truth behind her scientist parents' sudden and unexplained disappearance.