Darkness has come to Earth, invited, but without Clarie and Patrick's knowledge. It isn't until Clarie comes face-to-face with the Darkness that she realizes the danger their beloved Earth world is in. Their fates lie in the shadow realm of Mortgatha, the home of Darkness. They must help Joseph fight the deadly Shadowed Hands; their actions are governed by a centuries old myth that has taken young people who are innocent of the dark realm. With the assistance of an indigenous Light creature, they cause a chain of events that could destroy the hands of Darkness forever or deny Clarie and her friends any chance of returning to their beloved Earth world.