All her life, Cassia has never had a choice. The Society dictates everything: when and how to play, where to work, where to live, what to eat and wear, when to die, and most importantly to Cassia as she turns 17, whom to marry. When she is Matched with her best friend Xander, things couldn't be more perfect. But why did her neighbor Ky's face show up on her match disk as well?

"Rio has always dreamed of leaving the underwater city of Atlantia for life in the Above; however, when her twin sister, Bay, makes an unexpected decision, Rio is left stranded below where she must find a way to unlock the secrets of the siren voice she has long hidden and save Atlantia from destruction"--