What could be the possible plot in a fanfiction where Dumbledore gives Harry to Voldemort?

One possible plot development could be that Dumbledore gives Snape to Harry as a sort of guide in the wizarding world. Snape, with all his knowledge and experience, could show Harry things that Dumbledore couldn't. This might include some dark arts knowledge that could be used against Voldemort. It could also be a test for both of them. For Snape, to see if he can truly be selfless in helping Harry, and for Harry, to learn to trust Snape despite their past differences.

One possible plot development could be that Harry initially struggles with having Snape under his 'command' in some way. Since they had a very strained relationship in the original series, Harry might be hesitant to trust Snape even if Dumbledore has given him this new role. He could start by trying to figure out Snape's true intentions.

Well, in this fanfiction, perhaps Voldemort adopts Harry because he realizes Harry has some unique power that he wants to control. As Harry grows up, he starts to understand Voldemort's motives and tries to find a way to break free. He could also form unexpected alliances with some of Voldemort's followers who have a change of heart.

One possible plot could be that Harry is somehow tricked into believing Voldemort's cause is just. Maybe Voldemort uses some powerful magic to distort Harry's perception of good and evil. So Harry starts to help Voldemort in his quest for power, thinking he is doing the right thing.

Maybe Harry uncovers evidence that Dumbledore had been manipulating him all along. Like Dumbledore knew more about Voldemort's connection to Harry than he let on, and he was using Harry as a pawn in a bigger game. Harry, feeling betrayed, decides to expose Dumbledore's true nature, which would shatter the positive image everyone had of him.

One possible plot could be that Dumbledore wants Harry to take on a dangerous but crucial mission earlier than in the original story. He might be desperate because he sees a dark threat approaching faster and believes only Harry has the unique power to stop it.

It could be that after a series of events that make Harry question his own judgment, he submits to Dumbledore's authority. For instance, if there are false prophecies or misinformation floating around that lead Harry astray. Dumbledore, with his greater experience and knowledge, helps Harry see the truth. So Harry decides to submit to Dumbledore in order to get back on the right track and protect Hogwarts and the wizarding world.

Maybe in the fanfiction, Harry discovers some dark secrets about his past that make him question his whole existence and purpose. Like if he finds out that his parents' sacrifice was part of some bigger, more sinister plan, he could become so disillusioned that he gives up on life. He might think that everything he has been through was a lie and there's no point in going on.

A really interesting plot twist might be that Voldemort is being controlled by an even darker force, and Harry has to figure out a way to break that control while being held captive. Or perhaps Harry's friends, thinking he is dead, accidentally start a chain of events that end up helping Harry escape in a very unexpected way. For example, Hermione might cast a spell that was supposed to be for protection but ends up creating a portal right in Voldemort's lair.

Well, it could be that in this fanfiction, Harry discovers some long - hidden truth about the wizarding world that makes him realize Voldemort's motives aren't entirely baseless. Maybe there's a prophecy misinterpretation that leads Harry to think they can work together to fix the wizarding world's problems.