This is a novella, a prequel to the Mythos Academy series.
We meet Gwen Frost, a Gypsy with a gift of psychometry. She is doing what she can to live a normal life, but she is using her gift to earn some extra cash. After all finding lost keys and phones is ridiculously easy for her. But then she touches Paige's brush. And she is suddenly in a middle of a nightmare.
The purpose of the story is to meet Gwen, to realize what is it that led to her going to Mythos. We don't see much of the Academy.
It's an OK prequel, but I'm simply not a big fan of short stories that should make everything more clear, but they usually confuse.