Well, there could be a plot where Hermione, through a spell gone wrong, enters a dimension where Tom Riddle won the wizarding war and rules with an iron fist. She has to pretend to be on his side to survive and in the process, she discovers some redeeming qualities in him that she didn't expect. Another idea is that Hermione is researching a new form of magic that was only experimented with by Tom Riddle. As she tries to replicate his experiments, she accidentally summons a part of his spirit and they engage in a battle of wits and magic. And yet another plot could be that Hermione is sent on a mission to stop a new dark wizard who is using Tom Riddle's old methods, and in order to understand the enemy better, she uses a time - turner to go back and study Tom Riddle directly, which leads to unexpected interactions and consequences.
One possible plot could be Hermione using her modern knowledge and magic skills to raise Tom in a more positive environment. Maybe she teaches him about equality and kindness from a young age, which changes his view of the wizarding world and prevents him from turning into the dark lord. For example, she could introduce him to muggle culture and values, making him more accepting of different kinds of people.
One possible plot could be the exploration of how Hermione's strong will and intelligence clash with Tom Riddle's dark and manipulative nature within the context of a forced marriage law. Maybe she tries to reform him in some ways.
Well, one intriguing plot is when Hermione goes back in time to stop Tom Riddle from making Horcruxes. It adds a whole new layer of drama as she has to figure out how to do it without disrupting the timeline too much. Another plot is when she travels back and tries to befriend Tom as a child, thinking she can change his future that way. In some fanfictions, the plot of Hermione getting trapped in the past while dealing with Tom Riddle's rise to power is also very interesting.
One possible plot could be that Harry travels back in time to Tom Riddle's school days at Hogwarts. He could try to prevent Riddle from turning into Voldemort by befriending him and showing him a different path. Maybe Harry uses his knowledge of the future to expose the dark magic that was influencing Riddle at the time.
It's also about the time - travel or alternate universe concepts often used. For example, if Hermione goes back in time, she has the knowledge of the future. How will she use it to deal with Tom? Will she be able to change the course of history? All these possibilities make the fanfiction really engaging. And the power dynamic between them, with Hermione's magic being more learned but Tom's having a natural, dark power, adds another layer of complexity.
Another plot is where Hermione is accidentally transported to Tom Riddle's time and has to navigate the Hogwarts of that era while dealing with the enigma that is young Tom. Their interactions can range from friendly debates about magic to more intense confrontations as Tom starts to show his darker tendencies.
There's a fanfic titled 'Hermione's Shadow Encounter with Riddle'. In this story, Hermione is transported back in time and meets a young Tom Riddle. It shows how her modern knowledge clashes with his ancient, dark magic ways. It's a great read if you like stories that explore the contrast between different magical ideologies.
One interesting plot twist could be that Hermione's teachings accidentally lead Tom Riddle to an even darker path. Maybe she teaches him advanced magic that he then uses in unexpected and malevolent ways. For example, he could use time - turning magic she showed him to manipulate historical events to his advantage.
One interesting plot could be a time - travel scenario. Hermione somehow travels back in time to Tom Riddle's Hogwarts days. She tries to prevent him from becoming Voldemort. Maybe she uses her knowledge of magic and the future to show him a different path, like introducing him to the power of love and friendship that he was deprived of as a child.
Well, a possible plot is that Hermione discovers a hidden diary of Tom Riddle that has some sort of magic she has never seen before. As she delves into it, she somehow gets connected to Tom's memories and experiences his past. This could lead to her trying to understand what made him turn out the way he did and she might attempt to change his future. Another plot could be that in an alternate universe, Tom Riddle didn't become evil and he and Hermione meet at Hogwarts as normal students. They end up competing in academics and gradually develop a strange sort of friendship that challenges both of their beliefs.