Teens Jack, Marco, Aly, and Cass begin a quest to find seven pieces of Atlantis's power that were hidden long ago and that will, if returned to Atlantis, save them from certain death due to the genetic abnormality that also gives them superior abilities.

After the Neverseen prove how vulnerable she is, Sophie decides to learn how to fight, but battle training won't help her friend facing a different kind of danger.

"Dark schemes unfold--and Sophie's loyalty is pushed to the limit--in this thrilling fifth book in the bestselling Keeper of the Lost Cities series. Sophie Foster is back in the Lost Cities--but the Lost Cities have changed. The threat of war hangs heavy over her glittering world, and the Neverseen are wreaking havoc. The lines between friend and enemy have blurred, and Sophie is unsure whom to trust. But when she's warned that the people she loves...

While living with her latest set of foster parents, Ashley Rayburn mistakenly applies some found body paints which give her a wide range of special powers, but soon the military discovers what happened to their secret weapon and this puts Ashley and her newfound family and friends in danger.