Execution of the idea is what makes something an adventure game or not. Maybe have someone ask for her to find something specific for them. Then maybe she has to find her way to it past some kind of traps or creatures. Maybe she has to find something for someone else along the way. Maybe she learns that she doesn't want to deal with the original person any more and needs to find a way out of the issue.
There are a lot of possibilities for making such an idea into an adventure game. Of course you should create your own character instead of actually using Rey...
