Roots: There is a tree attacking people in Coolum. At least, that's what Gregor thinks. But someone, or something, is also planting saplings at the scene of each attack. That clue leads Banks and Gregor to Adrian's Enchanted Florist, Coolum's local flower shop. When they arrive, they are taken hostage by the wild-eyed owner, who has a devious plan: he wants to turn everyone in Coolum into a tree.