In a small town on the coast of California, everyone over the age of fourteen suddenly disappears, setting up a battle between the remaining town residents and the students from a local private school, as well as those who have "The Power" and are able to perform supernatural feats and those who do not.

As conditions worsen in the FAYZ, where supernatural forces have trapped children under the age of fifteen and resources are running out, it becomes tempting to heed the words of a prophet who says that only death will set them free.

A deadly, flu-like epidemic and a plague of flesh-eating creatures threaten the lives of the children at Perdido Beach while Sam, Astrid, Caine, and Diana each struggle with doubts and uncertainties.