Tally's perfect life as a Pretty is disrupted when she receives a letter from herself, written when she was an Ugly, reminding her of the promise she made to take a drug developed to cure the brain lesions that keep the Pretties shallow and happy--and when she takes the pills, she becomes a target of those determined to keep Pretty society carefree.

In a world that is rapidly descending into chaos, Frey and Rafi are twin sisters, but few people know of Frey's existence, because she has been raised to be her sister's body double and lethal bodyguard, while Rafi has been raised to further the family's political power--but when their father sends Frey in her sister's place as collateral in a tricky deal, Col, the son of a rival leader, gets close enough to begin to suspect something, and Frey must...