It could be that Lucius is under the orders of Voldemort. Voldemort wants Harry alive but in his control, so he sends Lucius to kidnap Harry. Lucius might then keep Harry in some secret location, perhaps an old Malfoy manor cellar, guarded by dark magic spells. Harry would then have to find a way to escape, maybe by using his own unique magic abilities or with the help of his friends who eventually figure out where he is.
Well, clearly Lucius Malfoy and Hermione Granger are the main characters. Lucius is the one doing the kidnapping, so he drives the initial action. Hermione is the victim of the kidnapping, and she becomes the focus of the story as she tries to deal with the situation.
Another plotline could involve the other characters' reactions. Harry and Ron might go on a rescue mission. They would face various challenges while trying to find Hermione and Lucius. They could encounter Lucius' Death Eater allies and have to fight them off.
Hermione could be a great addition. She could be the voice of reason when Harry starts getting closer to Lucius. Her intelligence and knowledge of magic could also help in any situation they face together. Another good character would be Draco. Since Lucius is his father, it would add an interesting dynamic. Draco could be conflicted about his father's new relationship with Harry. And of course, Dumbledore. His wisdom and guidance could play a crucial role in how the relationship between Harry and Lucius develops.
Harry would probably be extremely cautious. He has a strong sense of right and wrong, and Lucius has been on the wrong side in his eyes. Harry would be analyzing Lucius' every move, trying to understand if this is some sort of new Dark Arts plot or if there's something else going on. He would also be worried about the implications for his friends and the wizarding world in general.
Harry might start as a reluctant follower of Voldemort in the fanfiction. As time goes on, he could either become more hardened by the dark environment or find a way to subvert it from within. Lucius, who was already a Death Eater, may develop a more complex relationship with Harry. He could initially see Harry as a threat to his status with Voldemort but later come to respect Harry's strength and cunning.
One great 'Harry and Lucius Fanfiction' is 'The Unlikely Alliance'. It shows an interesting dynamic where they are forced to work together against a common enemy. The author does a great job of exploring their complex relationship.
Lucius' need in Harry Potter fanfiction could be power. He was always power - hungry in the original books. In fanfiction, this could be explored further. For example, he might try to find new dark magic artifacts or form new alliances to gain more power. He could also need revenge. If he feels that certain characters, like Harry Potter or the Weasley family, have humiliated him or his family, he would seek revenge in various creative ways that fanfiction writers can come up with. Maybe he would use his wealth and influence to undermine their reputations or set up elaborate traps for them.
Yes, there might be such fanfictions out there. The Harry Potter fandom is quite large and diverse, and fans often come up with unique and unexpected relationships in their fan - created stories. You can try searching on popular fanfiction websites like Fanfiction.net or Archive of Our Own.