Harry Potter has never played a sport while flying on a broomstick. He's never worn a Cloak of Invisibility, befriended a giant, or helped hatch a dragon. All Harry knows is a miserable life with the Dursleys, his horrible aunt and uncle, and their abominable son, Dudley. Harry's room is a tiny cupboard under the stairs, and he hasn't had a birthday party in ten years.
But all that is about to change when a mysterious letter arrives by owl messenger: a letter with an invitation to a wonderful place he never dreamed existed. There he finds not only friends, aerial sports, and magic around every corner, but a great destiny that's been waiting for him... if Harry can survive the encounter.

金斯艾伯特村里坐落着两座豪宅，“皇家围场”是其中之一，而居住其中的弗拉尔斯太太刚刚过世。
此后不久，她的情人，也就是住在另一所大宅里的罗杰•艾克罗伊德先生便得知，弗拉尔斯太太一年前杀害了自己的丈夫，最终因愧疚而自杀。更重要的是，罗杰还发现她在死之前一直被一个神秘人敲诈。他展开她最后的来信，打算读出那个人的名字，可惜没有人听到。
因为一把短剑插进了他的后颈……