Long ago a prison called Zzyzx was created to contain the earth’s most dangerous race, the Demons. After centuries of  planning, the  Sphinx is about to finish the mission he started so long ago, to release the Demons. With a chance for the world to end, all allies of light must unite to have a chance to defeat the Sphinx and lock the Demons back up again. Will Kendra, Seth and their allies be able to defeat the Sphinx? Read Keys to the Demon Prison to find out.