In an act of desperation, inventor Maxwell Watt entrusts his son to secretly deliver plans for his completed steam engine to Nikolas Klaus, a master inventor in another kingdom. When the Fare, the nefarious secret society, learns the game-changing invention’s plans are en route, they accelerate their own scheme to neutralize Klaus on their path to reclaiming long-lost control over kingdoms.

Meanwhile, after a decade of relative tranquility in Mineau, local children have started to go missing—again. Captain Archambault suspects the return of the disturbing and depraved Ginger Lady. With the help of Tee, Elly, and Richy—the Yellow Hoods—the search is on to find the missing children before it is too late.

What is the secret that ties one of the Yellow Hoods to the Ginger Lady?