After discovering she is a witch at eighteen, Ophelia Hart is thrown into Hogwarts during seventh year under a rare late-admissions programme, instantly becoming the most controversial student in Slytherin House. Surrounded by wealthy pureblood elites who view her as an outsider, Ophelia quickly earns a reputation for her sharp tongue, dangerous confidence, and refusal to let anyone intimidate her — especially a certain arrogant blond Slytherin boy who seems to hate her almost as much as he becomes obsessed with her.