When Alex Patrick was assaulted by another student last year, her elite boarding school wouldn't do anything about it. This year Alex is head of the Mockingbirds, a secret society of students who police and protect the student body. It isn't rape. It isn't bullying. It isn't hate speech. A far-reaching prescription drug ring has sprung up, and students are using the drugs to cheat. But how do you try a case with no obvious victim? Especially when the facts don't add up, and each new clue drives a wedge between Alex and the people she loves most.