John and Phillippa Gaunt are twins. Ordinary human children, they believe, but when their parents housekeeper wins the lottery, they make an extraordinary discovery. The twins are Djinn and their mystical power has just made Mrs. Trump's dream come true, but Djinn magic is tricky and dangerous and their new found skills must be controlled. So their eccentric uncle Nimrod becomes their teacher, but far too soon he whirls them off to Egypt in search of the tomb of a lost Pharoah and they're flung into a terrifying battle against lblis, the most evil Djinn in the world!