It's September the 1st, and Sophie Baker once again returns to Hogwarts. With the every-day company of Draco Malfoy, a good friend of hers and a fellow Slytherin, and Severus Snape, her favourite Professor of all time, Sophie believed that this would be just another normal yet adventurous and fun Hogwarts school year. But then she meets a new First-Year Slytherin student whom she hears strange hissing noises around. He seems perfectly normal and like a good person to be around, but rumors start to spread and friends become enemies overnight. Soon nobody seems to be safe inside the Hogwarts castle as Muggle-Born and Half-Blood students start seeing and hearing things that others don't. Sophie, Draco and Snape must discover what is causing all of this before it is too late, "Only pure wizard's blood shan't be spilled..."