A more character - driven plot could be about the caretaker forming an unlikely friendship with a visitor to the ruins. The visitor could be from a completely different world or culture, and through their interactions, both characters grow and learn more about themselves and the significance of the ruins.
One plot idea could be Naruto getting transported to the world of High School DxD where Rias is. He might use his ninja skills to help Rias in her battles against other devils or supernatural threats. Another could be Naruto teaching some of his ninja techniques to the characters in the High School DxD world, creating a new form of combat.
Start with a basic personality trait. For example, if the caretaker is a loner, show how this affects their daily life in the ruins. They might be more in tune with the sounds and small changes in the ruins because they spend so much time alone.
A great 'adam ruins everything fanfic' might be set in a school environment. Adam comes to the school to give a talk on a trendy new teaching method that everyone is raving about. He starts by looking into the research behind it and then proceeds to show how it's not as effective as people believe. He might use examples from real - life classrooms and student performance data to make his case.
Another plot could revolve around the characters having premonitions of the events that are going to occur in the quarry. They then have to decide whether to trust these visions and how to act upon them. This could add a whole new layer of suspense and mystery to the story.
One idea could be a time - travel plot. The Backyardigans accidentally find a magical object in the backyard that sends them to different eras in history. They could have to work together to find their way back home while also learning about the different time periods. For example, they might end up in the prehistoric era and have to deal with dinosaurs.
One idea could be a story where one of the dalmatian puppies gets lost during a family outing and has to find its way back home, facing various challenges along the way.
One idea could be exploring the backstory of a minor character in the Bioshock universe. For example, a splicer's journey before they became spliced. It could show how they were once an ordinary citizen of Rapture and what led them to make the fateful decision to use ADAM. Another plot could focus on an alternate timeline where the protagonist makes different choices. Maybe they side with the wrong faction and have to deal with the consequences. A third idea is a story centered around a new type of plasmid that has unexpected effects on the user and how it impacts the power dynamics in Rapture.
Another plot could involve the creation of a female monster. In the original, Victor Frankenstein was hesitant to create a female. A fanfic could explore what would happen if he did. Maybe the two monsters would have a complex relationship, and together they would try to find a place in the world that would accept them.
One idea could be that Batman and Wonder Woman team up to stop an ancient, otherworldly threat that's beyond the capabilities of the Justice League alone. They have to travel to different dimensions and rely on each other's unique skills.
A heatwaves fanfic could center around a young couple. The heatwave makes their living situation difficult, like their apartment has no air conditioning. They have to find creative ways to cool off and in the process, their relationship deepens. They could also get involved in community efforts to help those more affected by the heatwave, such as the elderly or the homeless.