In this collection of stories set in the world of the best-selling Darkest Minds trilogy, a desperate young man is forced to make a terrible choice; a spark of light brightens a brutal world when a girl named Sam encounters her childhood best friend at the government-run "rehabilitation" camp; and, even though Sam is thrown into a terrifying and uncertain new life, her survival at stake, the time has come to fulfill a promise she made.

When the Children's League disbands, Ruby becomes a leader and forms an unlikely alliance with Liam's brother, Cole, but competing ideals threaten the mission to uncover the cause of IANN and free psi children from the camps.