Emily and Navin head for Kanalis, a beautiful and mysterious city of waterfalls, where they hope to find the antidote for the poison that's making their mother severely ill. That cure lies in the rare fruit of the trees that sit atop Demon's Head Mountain.The kids' archenemy, Trellis, is also headed there for his own reasons. It's up to Emily to triumph over evil while controlling the Amulet's power … without losing herself!