In a 'Harry Potter in New York' fanfiction, the plot might involve Harry being exiled from the UK wizarding world for some reason. He moves to New York to start anew. There, he discovers that the New York wizarding community has a different approach to magic. He starts teaching at a local wizarding school and uncovers a conspiracy within the school that is linked to a powerful dark wizard from the past. Harry then has to use his skills and knowledge to stop this threat.
Well, perhaps in this fanfiction, Harry Potter is in New York to attend an international wizarding conference. While there, he gets lost in the muggle part of the city and has to use his magic discreetly. He meets a young witch who is trying to solve a mystery related to an ancient magical artifact hidden in New York. They then embark on an adventure together to find the artifact before it falls into the wrong hands.
One possible plot could be that Harry Potter, on a secret mission for the Ministry of Magic, travels to New York. There he discovers a hidden magical community that has its own unique set of spells and traditions. He teams up with local wizards to fight a dark force that is threatening to expose the wizarding world to the muggles of New York.
There could be a character like Jake, a young wizard who grew up in the New York wizarding community. He could be very street - smart and know all the hidden alleys and secret magical places in New York. He would befriend Harry and help him navigate the new environment.
He could sell magical potions. In the Harry Potter universe, potions are very popular and useful. They can cure various ailments or give special powers for a short time.
It could be about Harry getting a new chance to save Sirius. Maybe in this fanfiction, the events at the Ministry of Magic unfold differently. Instead of Sirius being killed by Bellatrix, a time - turner - like device gives Harry a new opportunity to prevent his godfather's death. He could use new spells or strategies he didn't think of before.
Well, it could be about a new character named Robin who enters the wizarding world of Harry Potter. Maybe Robin is a muggle - born with extraordinary powers that haven't been seen before. This new character could get involved in the fight against the dark forces, forming an unlikely alliance with Harry and his friends.
Maybe Harry Potter has to use his magic to fight against the apocalyptic disasters like hordes of dark creatures or a spreading deadly magic. He could gather his friends and allies from Hogwarts and the wizarding world to try and stop the end of the world.
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.
In this fanfiction, Harry could be on a quest related to some ancient magic that is tied to New Orleans. He may end up getting involved with the local magical community's power struggles. For example, there could be a fight over a powerful voodoo talisman, and Harry's skills from his Hogwarts days come in handy to help resolve the situation. Also, he might start to learn about the unique magical creatures that are native to the area.
One possible interesting plot could be Harry finding a new magical dimension where the rules of magic are completely different. For example, instead of using wands, magic is controlled by thoughts alone. He has to learn these new ways quickly to face a dark threat that exists in this dimension which is planning to invade the wizarding world he knows.
Maybe the new staff has some special powers. It could be that the staff was given to Harry by a mysterious figure, and it helps him in a new adventure against a new dark force.
Well, obviously Harry Potter himself is a main character. He is the one who brings his British wizarding skills and experience to the New York setting. Then there might be some American wizard characters. For example, a young and brave American witch who helps Harry understand the differences in the American magical world. There could also be a powerful American wizard who acts as a mentor or guide to Harry in this new environment.