Well, it could imply that the girl who managed to get away from ISIS is now telling her tale. It might focus on her journey, challenges, and eventual escape.
The girl's story of escaping ISIS is one that would be both terrifying and inspiring. ISIS enforces a strict and often cruel regime. She may have witnessed atrocities that are hard to even imagine. Her escape might have been a long - planned and risky endeavor. Maybe she had to rely on the kindness of strangers or use her wits to outsmart her captors. It is a story that can give hope to those in difficult situations and also shine a light on the reality of life under ISIS.
I'm not sure specifically who the girl is without more context. It could be a fictional character created for a particular story, perhaps a girl who managed to escape from a difficult situation like a dangerous place or a bad relationship.