Cassia has always followed the rules of the Society. It's at her Matching ceremony where Cassia's life is changed forever when her best friend Xander's is revealed to be her Match. While this should be a happy time Cassia is haunted by the flash of another boy's face when she uses the card. The Society explains the reason she saw Ky as a rare glitch and nothing more and that the boy will never be matched because he's an Aberration. Cassia can't deny the fact that she's drawn to Ky he's unlike Xander in many ways he also has a secret like her. 
 As Cassia takes her tests for her final job placement she starts to question everything she's be taught. When the officials gather all the artifacts from the people it spurs Cassia to know Ky more. While they each continue to play the part they are expected to they each share in writing words that aren't permitted to exist. As they grow closer Cassia will be put the test torn between love and following the rules. Will they survive what's to come? And why are the officials acting so strange? 
 I like Cassia she's an interesting characters. I'm torn between both Xander and Ky they each have something to offer Cassia but choosing the right one won't be easy. I like that Cassia grows through the book from the girl that follows the rules to a rule breaker. I'm curious to see what the future will hold for the trio.