After Diana thwarts a stunning attempt to defeat the Amazons and Themyscira for good, she has finally been granted permission to start training as a warrior! Except, the goddess Artemis brings news that children all over are disappearing without a trace. Diana is the only one who can be trusted to save them-even if she must confront Hades, Persephone, and all of the undead souls and mythical creatures of the Underworld. That is, until she discovers that a far more sinister villain is out to capture her-and will do whatever it takes to find her. With her warrior training barely underway, will young Wonder Woman be able to save the missing children and defeat Hades?