I'm not sure specifically which 'Once upon a time in London' true story you are referring to. There could be many events. It might involve things like the growth of a particular community in London, the story of an individual's rise to success or the account of a historical event that took place in London.
As I don't know the exact story, it could be anyone. It might be a group of friends who grew up in London, or a businessperson who made an impact on the city.
One popular 'Once a upon a time story' is 'Cinderella'. It's about a kind - hearted girl who is mistreated by her stepmother and stepsisters but eventually finds true love with the help of her fairy godmother. Another is 'Snow White', a beautiful princess who has to flee from her evil stepmother and finds refuge with the seven dwarfs. And 'Sleeping Beauty' is also well - known, where a princess is put into a deep sleep by a curse and is awakened by a prince's kiss.
Family relationships are a big theme. Some fanfics focus on the family dynamics between characters like the Charmings and their descendants. There are also fanfictions that revolve around the theme of identity. Characters in 'Once upon a time' often have complex identities, and fan writers like to dig deeper into how these identities are formed and how they can change over time.
Once upon a time, a family bought a new house. In the basement, there was a locked door. One night, the youngest son heard strange sounds coming from behind that door. He found the key and opened it. Inside, there was a dark room filled with old portraits. As he looked at them, the eyes in the portraits seemed to follow him. He quickly closed the door but could still hear the voices from the room.
A 'found family' trope is quite common. Characters who were alone or estranged in the show form a close - knit family in fanfiction. For instance, Henry might bring together different characters who then become his new family. Also, the 'hurt/comfort' trope, where a character is hurt (physically or emotionally) and another character comforts them, is frequently used in Once upon a Time fanfics.
One classic 'once upon a time' story is 'Cinderella'. Once upon a time, there was a kind - hearted girl named Cinderella. She was mistreated by her stepmother and stepsisters. But with the help of her fairy godmother, she was able to go to the royal ball. She lost her glass slipper at the ball, and the prince searched for the owner of the slipper. Eventually, they got married and lived happily ever after.
Definitely not. 'Once Upon a Time' is purely fictional. It combines elements of fantasy, adventure, and drama to weave an engaging tale that doesn't have a basis in reality. The characters and events are all made up to captivate the audience.