In Victorian London, a mysterious organization known as the Mechanic’s Guild has discovered the secret to create extraordinary engines of war, granting the British Empire unprecedented power. The Guild’s enigmatic founder, Archimedes Tesla, uses this power to become one of the greatest men in the city, creating a kingdom filled with leather, lace, copper, and steel. Meanwhile, two young women are found murdered, each with mechanical hearts implanted in their chests where their natural organs should be. Inspector Thomas Hill, a member of London’s aristocracy, is tasked with finding the killer. Thomas enlists the aid of his childhood friend and now the youngest surgeon in London, Dr. Jackson Elliot, to help him unravel the mystery. Jackson is tragically tormented by his love for Thomas’ sister, Sophia, whose own heart is failing, beyond all medical help. Jackson will do anything in his power to save his precious Sophia. Could finding the killer hold the key to saving the woman he loves?