A possible plot is that Betty is tired of trying to be the perfect girl in Riverdale. She's always been the good student, the good daughter, and the good friend. But she's reached a breaking point. So she starts to rebel a little. She skips school, dyes her hair a wild color, and starts hanging out with a different crowd. This causes a stir in Riverdale and makes her friends and family worry about her. It could also lead to her uncovering some secrets about the people she thought she knew.
One idea could be that Betty has been overworking herself on a big mystery in Riverdale. She's constantly chasing leads, staying up all night, and it's starting to take a toll on her. Maybe she starts having hallucinations related to the mystery, like seeing suspects everywhere she goes. Another plot could involve Betty being tired of the constant drama in Riverdale. She decides to take a break from all the chaos and goes on a solo trip outside of town, but of course, trouble follows her.
Well, Betty could be tired of the love triangle she's often in. She's constantly torn between Archie and Jughead. So in the fanfic, she decides to focus on herself and her career goals. She gets really into journalism and starts working on a big story that has nothing to do with her personal relationships. But as she delves deeper into the story, she realizes that it's somehow connected to her love life after all. This would add an interesting twist to the typical Riverdale drama.