"My name is Tessa. I am strong. I am brave. I do not cry. These are the only things I know for certain. I was found in the outback, ragged as a wild thing. I have no memory; not even of how I got the long slashes across my back. They make me frightened of what I might remember. The policewoman, Connolly, found me; and placed me; in a boarding school and told me about her daughter, Cat, who went missing in the outback. I think there is a connection between Cat, me, and the strange things going on at this school. If I can learn Cat's story, I might discover my own and stop it happening again." A thrilling paranormal tale of shapeshifting, a centuries-old war, and finding out who you really are when your memories betray you.

Cat Connolly is a Thyla now. She's not sure where her life is heading, but she knows she doesn't want to go back to the human world. But all is not well among the shapeshifters. The treaty between the Thylas and the Sarcos is causing tension and the malevolent Diemens are still on the hunt. Then into Cat's life wanders someone who should be an enemy but acts like a friend - and everything changes again. She discovers more about shapeshifters and Diemens, about Tessa, and about her own heart. Vulpi continues the story of Tasmania begun in Thyla. It is the story of how the shapeshifters were created, and a clue to what they might become. It is the story of what happened to Cat, and about the decisions we all must make as we learn how to be.