With just two days left to reach Solis, the Fantasia must cross the lake, which contains a serpent-like monster, the Taniwha. Obtaining cooperation from the Laketowners, who agree to be their guides, they begin to cross, but not all is as it seems. The children are led into a trap set by Ozul and Maska. Will they survive? What is Timon up to? Why has his attitude change so dramatically?