This book is about a girl named Gemma, who lived with her mother in India. Gemma's mother is killed by some sort of shadow figure, so she is sent to an all girls school called Spence Academy. When she arrives at the school she realizes that her mother is still alive, and that she is a powerful witch. She travels to another realm and meets different magical creatures. She also figures out that she has to stop a powerful witch that is posing as a teacher at the school. Gemma needs to find out who it is and get rid of her...quickly and quietly. Along the way trusts are formed, friends are made, and another death might rip reality apart.