Well, perhaps Dumbledore has some dark secret and believes Harry is the key to it. He might kidnap Harry to keep him away from Voldemort in a very unorthodox way. Maybe he wants to train Harry in isolation for some super - powerful magic that he doesn't want Voldemort to find out about.
One possible plot could be that Dumbledore has foreseen a future where Harry's actions will lead to a much greater disaster. So, in a rather extreme move, he kidnaps Harry. He might take Harry to a different dimension or a secluded magical realm. There, he plans to change Harry's perception of the wizarding world and his role in it, trying to prevent the disaster he has foreseen. However, this would be a very different Dumbledore from the one we know in the original series, and it would create a lot of conflict and drama within the fanfiction.
One possible plot could be that Dumbledore has been possessed by a dark entity. Under its influence, he kidnaps Hermione thinking she has some knowledge or power that the entity wants. Hermione then has to use her wits to try and break Dumbledore free from the possession while also trying to escape.
In this fanfiction scenario, Dumbledore could be acting out of desperation. He may have seen a future where Harry is in great danger and the normal means of protection within Hogwarts are no longer sufficient. So, he resorts to kidnapping Harry. It could also be related to some secrets about Harry's family or his own power that Dumbledore has been keeping. He might think that by taking Harry away, he can finally reveal these secrets to him in a controlled environment and train him better for the upcoming battles.
In this kind of fanfiction, it could be that Dumbledore has some very complex motives for 'kidnapping' Harry. Maybe he wants to protect Harry from a danger that he can't explain openly. For example, there might be a powerful dark wizard who has found a way to spy on Hogwarts and Dumbledore believes that keeping Harry in a secret location is the only way to keep him safe.
Perhaps in this fanfiction, Dumbledore has a secret plan related to Harry's power. He might think that by kidnapping Harry, he can train him in isolation to fully develop his magical abilities without the distractions and potential dangers at Hogwarts. It could also be that Dumbledore is trying to hide Harry from Voldemort in a way that no one would suspect, as Voldemort would never think Dumbledore would use such extreme measures against Harry.
One possible plot could be that in a battle against a powerful dark magic, Harry accidentally casts a spell that links him to Dumbledore. As a result, he starts to experience Dumbledore's memories and emotions, which gives him new insights into the wizarding world's history and secrets.
Well, perhaps Harry is frustrated with Dumbledore's secrets. Maybe he's angry about being kept in the dark regarding his own fate or the danger around Hogwarts. So he decides to confront Dumbledore and let out all his pent - up feelings.
Well, perhaps the fanfiction could start with the protagonist being kidnapped by a group of Harry Styles fans who are obsessed with getting her to stop spreading rumors (even if she hasn't). They take her to an abandoned building. Harry, who is actually a really nice guy in this story, hears about it and uses his influence and resources to track her down. Along the way, the main character discovers that Harry is not at all what she expected from a celebrity, and they develop a connection that goes beyond the whole kidnapping ordeal.
The plot could involve the kidnapped character having some sort of special power or knowledge that Harry Hook wants. So he kidnaps them to use it for his own gain. However, the character might be more resourceful than he thought. They could start to turn his own crew against him, creating a lot of drama and action within the fanfiction.
Well, perhaps Voldemort's followers could kidnap Harry to use him as a bargaining chip. They might hold him in an old, dark wizarding house, guarded by dark magic. Harry would then try to escape using his own magic skills and the help of some unexpected allies like house - elves who secretly oppose Voldemort.
I'm not sure if there is a specific 'Harry Potter Dumbledore Stealing Fanfiction' out there. However, if there were, the plot could potentially involve Dumbledore stealing something important like a powerful magical artifact that he believes is necessary to protect Hogwarts or the wizarding world from a great evil, but his actions are misinterpreted by the characters in the fanfiction.