Just before the start of Summer Half, in April 1883, a very minor event took place at Eton College, that venerable and illustrious English public school for boys. A sixteen-year-old pupil named Archer Fairfax returned from a three-month absence, caused by a fractured femur, to resume his education. Almost every word in the preceding sentence is false. Archer Fairfax had not suffered a broken limb. He had never before set foot in Eton. His name was not Archer Fairfax. And he was not, in fact, even a he. This is the story of a girl who fooled a thousand boys, a boy who fooled an entire country, a partnership that would change the fate of realms, and a power to challenge the greatest tyrant the world had ever known. Expect magic.