After a deadly journey to the Underworld, things are only getting worse for Pandora and Apollo. Luckily, they found Pandora's missing sister, but the discovery of her in the Underworld inspires more questions than answers.
And they still haven't discovered who opened the Box, releasing the Titans.
Doing so requires opening the door to a past Apollo has done everything to avoid.
But when there's no choice left, Pandora and Apollo must confront the truth...no matter what it reveals.