It's 1971 and Clarissa "Cat" Wright gets a letter from a strange place called Hogwarts. She goes there and gets bullied terribly, but it's still better than home. She makes four best friends-Lily Evans, Skye Collins, Ciara Edwards and Hayley Beverly. All of them have their own problems and, with the exception of Lily, are outcasts. But, each summer, things at home get worse and worse for Cat. Her mum dies-her dad does the unimaginable. In fourth year, her best friends start to hate her. Is Cat who she thinks she is? Who is the mysterious Jordan Potter? Will the torture ever stop? Will Sirius Black, her cruelest bully, save her? And how long will it take for Cat to crack?