Having vanquished the murderous Crossed Swords Guild in "Assassin Prince", no one would blame the Grey Riders for resting on their well-deserved laurels. However, the evil Ja'al cult is not done with them nor with the world of Damora. The Riders again fly their pegasi to far-flung locales, seeking to destroy the Skull Gates, portals to hellish lands that are rumored to bring in daemons intent on mayhem and destruction. However, a sinister plot with catastrophic implications lurks in the background. Unknown to them, two absent Riders, the beloved Alenar sisters, have been captured by the Ja'al and are being forced to undertake crucial roles in the Gates' dark purpose. The Riders must focus their efforts on finding and destroying the Skull Gates before they can be employed to wreak havoc. They will need all their reserves of faith, hope and love to deal with tremendous loss and sorrow, while thwarting the Ja'al plans for total world domination...