One possible plot could be that there is a magical artifact that both Hermione and Dolohov are after. They cross paths in an ancient, enchanted library. Hermione is there to study and protect the artifact from falling into the wrong hands, while Dolohov wants it for Voldemort. They engage in a battle of wits, with Hermione using her vast knowledge of magic and Dolohov relying on his dark arts skills. Along the way, they might even develop an unexpected respect for each other.
In a 'hermione meets dolohov fanfiction', perhaps Dolohov is captured by the Order of the Phoenix. Hermione is assigned to interrogate him. At first, they are hostile towards each other. But as they interact more, they start to understand each other's motives a bit better. Dolohov might even start to have second thoughts about his allegiance to the Dark Lord because of Hermione's strong beliefs.
One possible plot could be that the other characters, like Harry and Ron, immediately start a rescue mission. They might search for clues about where Dolohov has taken Hermione. Maybe they discover that Dolohov is working for a more powerful dark wizard who wants Hermione for her knowledge of magic. Then they have to face various traps and dark spells to reach her.
One possible plot could be that Hermione is on a mission to bring Dolohov to justice for his crimes during the wizarding war. She uses her intelligence and magic skills to follow his trail.
One possible plot could be that in an alternate universe, Dolohov has a change of heart. He somehow crosses paths with Hermione, and they gradually develop an unexpected bond. Eventually, they have a child, and the story could revolve around how they protect their family from the prejudices of both their former worlds.
One possible plot for this fanfiction is that Hermione wants revenge on the Death Eaters who have caused harm to her friends and the wizarding world in general. Dolohov, having once been a Death Eater himself, could provide crucial information about their hideouts, plans, and weaknesses. This would give Hermione an edge in her quest for revenge. He could also use his combat skills, which are no doubt formidable, to protect Hermione during her confrontations with the bad guys.
One possible plot twist could be that Hermione uses her intelligence to outwit Dolohov even while kidnapped. Maybe she manages to leave hidden clues for her friends to find her. Another could be that Dolohov has an ulterior motive other than harming her, like using her as a bargaining chip in the wizarding war. Or perhaps Hermione discovers a hidden power within herself during the time of her captivity that helps her escape.
Perhaps in the fanfiction, Hermione meets Rabastan in Azkaban during one of her visits related to some research. Rabastan could be bitter and full of tales of the old days. Hermione, seeing an opportunity to understand the Death Eater mindset better, starts a conversation with him. This encounter might lead to a series of events where she has to decide whether to trust him or not as he offers her some unexpected help regarding a magical mystery.
I think Dolohov could be the most interesting. He's a Death Eater, so he has a dark and mysterious side. Meeting Hermione could be a turning point for him. His interactions with her might make him question his loyalty to Voldemort. It would be fascinating to see his internal struggle as he deals with Hermione's goodness and intelligence.
Perhaps it's because the fanfiction shows Hermione in a new and interesting light. Maybe it portrays her with unique character developments or puts her in unexpected and exciting situations that Dolohov finds captivating.
It could also be that Dolohov's desire for Hermione causes a rift among the Death Eaters. Some might see it as a distraction or a sign of weakness. This internal conflict within the Death Eaters could then be exploited by Hermione and her allies to their advantage in the fight against the dark side.
A possible plot for Hermione and Dolohov fanfiction could be that Hermione is researching a very rare and dangerous form of magic. Dolohov, who has some knowledge about it, crosses her path. At first, they are at odds, but as they dig deeper into the mystery of this magic, they find that they need each other's skills. Maybe there is a prophecy involved that links their fates. This could lead to a series of adventures where they have to trust each other, even though their backgrounds are so different. It could also explore how Hermione's values might influence Dolohov or vice versa.