Two months after defeating Voldemort, Harry Potter has been experiencing dreams, dreams of a certian woman, a certian woman related to Tom Riddle, and she may not be pleased that Harry Potter has killed her only brother.
(Lets suppose Tom Riddles mother did not die after his birth but after his sisters birth?)
Will Harry have to kill another Riddle? Or Will he befriend her? Will Harry learn everything he needs to ever know about Voldemort with her help? Perhaps Harry will have a full understanding on who Tom Riddle was really like.