17-year-old Stella Hamilton is the star blazing at the heart of Temperley High. Leader of the maliciously exclusive elite, she is surrounded by adulation; envied and lusted after in equal measure. And she is in the final stage of a five-year campaign to achieve her destiny: love with her equally popular male equivalent, and triumph as Head Girl on election night. By contrast, new girl Caitlin Clarke has until now lived a quietly conformist life in New York. With the collapse of her parents’ marriage she has been sent across the Atlantic for an English boarding school education, only to discover that at Temperley, the only important rules are the unwritten ones. It's a world of the beautiful and the dangerous, and acceptance means staying on the right side of Stella Hamilton, the most beautiful and dangerous of them all. Not everyone is happy to be under the Hamilton rule. But fighting the system means treading the same dark path as Stella - and if Caitlin puts a foot wrong, it's a long way down . . .