Sori and Pax return in the next thrilling chapter of the Inner Sanctum saga! The Nightmare king Thanatos and his army have come out of hiding, but this time, they unleash a powerful weapon that catches the Sanctum Force off- guard. As Pax goes on a mission to discover more about this new threat, he and the other Sanctum Force members will get a taste of what it's like to join the dark side. Will the heroes be able to defeat this new evil...or will they be succumbed to it?