Dani is just going to the bank. It's fine. Nothing to worry about. But for Dani, it's everything to worry about. There are people at the bank, and people move slow. Not Dani, though. Dani's fast. Faster than anyone. That's the problem. She's too fast, and if anyone notices just how fast she is, they'll report her and she'll be on the run again. She can outrun everything, but she's starting to get tired.
I love superhero stories, but I can't ever stop thinking about the struggles a superhero must have. A speedster sees the world a hundred seconds for each one we do, and this explores that.