The main plot of such a fanfic could vary greatly. It could be a story of Harry starting a new magical school, or it could involve him uncovering long-lost magical secrets and having to deal with the consequences.
It could be about Harry's life after the events of the original series, maybe with new magical adventures or challenges.
One idea could be a new student arriving at Hogwarts. They could be a muggle - born with a very unique magical ability that even the professors are surprised by. This new character could start making friends with the main characters like Harry, Hermione and Ron, and get involved in some mystery that is starting to unfold in the school.
One possible plot could be that Harry discovers he has a long - lost relative who was a powerful wizard but had been exiled for some reason. This relative has left behind a set of magical tasks for Harry to complete that will lead him to a new kind of magic that he's never known before. It could involve traveling to far - off magical lands and making new allies.
It's hard to say without reading it. It could be the original characters like Harry, Hermione, and Ron if it's a continuation of their story. Or it might focus on new characters created by the fanfic author.
The main plot of such a fanfic could be something like a time travel element where Harry has to correct a past mistake to ensure a better future. Or it could be a story about a new magical government order that changes everything for wizards and witches.
Since it's a Harry Potter fanfic with 'a new beginning' in the title, it could center around a major shift in the existing relationships in the series. It could be that Harry, Hermione, and Ron start a new chapter in their lives where they have to deal with long - forgotten secrets that surface. This fanfic might also introduce new magical creatures or spells, and show how these elements change the dynamics of the wizarding world they know.
A former Death Eater who has had a change of heart could be the main character. They are now trying to make amends and start a new life. Their past experiences would make them a complex and interesting character as they struggle to fit into the new, post - Voldemort wizarding society.
There could be a group of rogue Death Eaters who escaped justice and have banded together again. They believe that Voldemort's ideas were right but that he was too weak. So they target Harry, thinking that if they can defeat him, they can finally achieve their goal of a pure - blood - dominated wizarding world. They might be more cunning and less flashy than Voldemort, making them a more difficult enemy to detect.
Maybe Harry discovers a new magic that was long forgotten. For example, he might find a spell book in the Forbidden Forest that leads him on this new path of magic exploration.
It could be about Harry starting a new life away from the wizarding world, perhaps in the Muggle world. He might use his magic in secret to help Muggles in need.
Well, it could be about a new character in the Harry Potter world who has the powers or the role similar to Merlin. Maybe this new character uses magic in a way that combines the traditional Harry Potter magic with the ancient and powerful magic associated with Merlin. For example, they might be able to perform spells that are long forgotten in the wizarding world but were common during Merlin's time.