The Royal Society of London plays home to the greatest minds of England. It has revolutionized philosophy and scientific knowledge. Its fellows map out the laws of the natural world, disproving ancient superstition and ushering in an age of enlightenment. To the fae of the Onyx Court, living in a secret city below London, these scientific developments are less than welcome. Magic is losing its place in the world-and science threatens to expose the court to hostile eyes.