Harry has a secrect that threatens the the muggle and magics communities' perceptions of reality and good vs evil. Everything is not black and white. There is a gray that threatens to comsume all.
Extra Extra read all about it in this installment of Eleventeen Magazine. Yes you heard right Eleventeen has in depth exclusive interviews with Harry, Hermionee, and Ron plus a bonus interview with everyones favorite evil doer Draco.