Well, how about an SVU story centered around a series of mysterious disappearances in a small town with a hidden dark secret?
Perhaps the sex work boss is in a love - triangle. One side is a person from the outside world who doesn't understand their work but they are attracted to. The other side is an assistant in their business who is very loyal and might have deeper feelings for the boss. This could create a lot of drama and tension in the fanfic.
Since 'Svu Fiction' isn't a widely known mainstream genre term, it's difficult to recommend specific works. But if we consider it in the context of being related to 'Law & Order: SVU', you could try reaching out to SVU fan communities on social media platforms. They might be able to point you towards some great fan - created stories, which could range from short stories about a particular character's backstory to longer, more complex crime - solving narratives set in the SVU universe.
Perhaps Olivia is kidnapped by a group of human traffickers. They mistake her for an easy target, not realizing she's a detective. The fanfiction could detail her experience in the hands of the traffickers, how she tries to resist and escape, and how the SVU team uses their resources and connections to track down the traffickers and rescue her.
Another idea is to do a crossover within the 'Law and Order' franchise itself. For example, have characters from the original 'Law and Order' work with the SVU team on a high - profile case that involves both criminal acts and special victims. This could lead to some interesting clashes in investigative styles and legal strategies.
As I don't know the exact 'svu official story', some possible key points could be the unit's mission, like protecting the rights of victims.
One idea could be to focus on the heroic actions of the first responders. For example, you could create a role play where characters are firefighters or police officers rushing to the scene to save lives. Another could be to depict the unity of the community in the aftermath, with people helping each other regardless of their differences.
One idea could be to focus on Amanda's mental state during the hostage situation. Maybe she's using her past experiences to stay calm and try to outwit Lewis. For example, she could be remembering her training and how to handle dangerous criminals like him.
One idea could be exploring an unshown backstory of an OC. For example, a character who has a hidden past related to a major crime in the SVU universe. Maybe they were a witness as a child but were too traumatized to come forward until now, and their presence in the SVU team stirs up old secrets.
Maybe there's a serial killer on the loose who targets victims in both Chicago and New York. The Chicago PD starts noticing a pattern of killings in their city, and SVU has been dealing with similar cases in New York. They come together to compare notes. The killer seems to be targeting young women who are involved in marginalized communities, whether it's through drugs in Chicago or prostitution in New York. The combined forces of both teams are needed to stop the killer before more lives are lost.
Well, Archive of Our Own (AO3) is also a great place to find 'across the pond svu fanfic'. It has a large collection of fan - created works. You can filter the search results by tags related to SVU and 'across the pond' to narrow down your options.