Tracker stumbles into a hidden jungle and its animal inhabitants who are frightened by the rumblings of an impending volcano. It's up to Ryder and the pups to use their new animal vehicles to rescue the creatures from the hot lava and save their home.

When the Hidden Jungle animals appear to be uncharacteristically frightened, Marshall discovers a saber-tooth tiger has been stalking them. And the big-fanged tiger is not the only creature strangely awakening from long, long ago

Liberty and the Poms team up with the Mighty Pups to save Adventure Bay from being crushed by a giant, flying Top Hat.